DashboardWrapper demo updates

re: https://github.com/patternfly/patternfly-react/pull/7927#pullrequestreview-1125650784

I think we want the vertical nav's aria-label to be "Global", otherwise the rotor reads this as "Nav navigation". "Global" is the default, so if we want to update, you could remove this entirely. This also matches the <PageToggleButton>'s aria-label, and those labels should probably match.

https://github.com/patternfly/patternfly-react/blob/22fc7d8e8189ef2da0eb483a8c35c4c0e2be3807/packages/react-core/src/demos/examples/DashboardWrapper.js#L73

https://github.com/patternfly/patternfly-react/blob/22fc7d8e8189ef2da0eb483a8c35c4c0e2be3807/packages/react-core/src/demos/examples/DashboardHeader.js#L220

A bunch of the demos have body text that references the Overpass font and some specific font styles that aren't relevant and may change (and be incorrect) as styles change over time. Just in general, I'd say we should review the body text of demos/examples and make sure we don't have other stuff like this. Here's a list of the places I found that reference the overpass text

packages/react-core/src//demos/Nav.md:                Body text should be Overpass Regular at 16px. It should have leading of 24px because 

packages/react-core/src//demos/Nav.md:                Body text should be Overpass Regular at 16px. It should have leading of 24px because 

packages/react-core/src//demos/Nav.md:                Body text should be Overpass Regular at 16px. It should have leading of 24px because 

packages/react-core/src//demos/Nav.md:                Body text should be Overpass Regular at 16px. It should have leading of 24px because 

packages/react-core/src//demos/Nav.md:                Body text should be Overpass Regular at 16px. It should have leading of 24px because 

packages/react-core/src//demos/Nav.md:                Body text should be Overpass Regular at 16px. It should have leading of 24px because 

packages/react-core/src//demos/Nav.md:                Body text should be Overpass Regular at 16px. It should have leading of 24px because 

packages/react-core/src//demos/Nav.md:                Body text should be Overpass Regular at 16px. It should have leading of 24px because 

packages/react-core/src//demos/Nav.md:                Body text should be Overpass Regular at 16px. It should have leading of 24px because 

packages/react-core/src//demos/PrimaryDetail.md:              Body text should be Overpass Regular at 16px. It should have leading of 24px because 

packages/react-core/src//demos/PrimaryDetail.md:              Body text should be Overpass Regular at 16px. It should have leading of 24px because 

packages/react-core/src//demos/PrimaryDetail.md:              Body text should be Overpass Regular at 16px. It should have leading of 24px because 

packages/react-core/src//demos/PrimaryDetail.md:              Body text should be Overpass Regular at 16px. It should have leading of 24px because 

packages/react-core/src//demos/PrimaryDetail.md:              Body text should be Overpass Regular at 16px. It should have leading of 24px because 

packages/react-core/src//demos/Banner.md:                Body text should be Overpass Regular at 16px. It should have leading of 24px because 

packages/react-core/src//demos/Banner.md:                    Body text should be Overpass Regular at 16px. It should have leading of 24px because 

packages/react-core/src//demos/examples/BackToTop/BackToTopNameDemo.tsx:              Body text should be Overpass Regular at 16px.It should have leading of 24px because 

packages/react-core/src//demos/NotificationDrawer/NotificationDrawer.md:                Body text should be Overpass Regular at 16px. It should have leading of 24px because 

packages/react-core/src//demos/NotificationDrawer/NotificationDrawer.md:                Body text should be Overpass Regular at 16px. It should have leading of 24px because 

packages/react-table/src//docs/examples/ComposableTableStickyToolbar.tsx:              Body text should be Overpass Regular at 16px. It should have leading of 24px because 

This page section should be isWidthLimited, or maybe some mechanism to add/remove that depending on what else is on the page (like if other page sections aren't width limited?), though I'm not sure if there is ever a use case where this wouldn't be width limited. I guess it doesn't matter here since the text isn't very long, but if more content is added, it will keep it from spanning the whole viewport.

https://github.com/patternfly/patternfly-react/blob/22fc7d8e8189ef2da0eb483a8c35c4c0e2be3807/packages/react-core/src/demos/examples/DashboardWrapper.js#L29-L34

Jira Issue: PF-169

まず packages/react-core/src/demos/examples/DashboardWrapper.js と DashboardHeader.js から始め、続いて一覧にあるデモの Markdown ファイルと TSX ファイルを確認して Overpass への参照を調べます。ナビゲーションラベルとページセクションの幅の挙動が要求どおりになり、特定したファイルのデモテキストに古いフォントに関する案内が残っていなければ完了です。