Publishing: Link to an aliased page should render page

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### What happened?

In the context of Page Publishing with only public pages generation, the page content is not displayed if called by its alias name.

### Reproduce the Bug

1. Create a page "BACK-PAGE"
2. Set it public, with an alias (ie: BP)
```
public:: true
alias:: BP
```
3. Create another page "FRONT-PAGE"
4. Type
```
Feel free to see my #back-page or my #bp
```
6. PUBLISH the graph
7. Check the graph output
=> Upon clicking on first link the page is seen. The second link is not showing anything - just like if the page wasn't public.
Link are differents:
url 1: file:///E:/Documents/testgraph/index.html#/page/back-page => my page
url 2: file:///E:/Documents/testgraph/index.html#/page/bp => nothing

### Expected Behavior

If a published page is called by its alias, it should be displayed

### Screenshots

_No response_

### Desktop Platform Information

Logseq 0.6.8

### Mobile Platform Information

_No response_

### Additional Context

_No response_

Start by reproducing the published graph with a public page that has an alias, then compare the generated links for the page name and alias. Trace the publishing and page-link handling used by the reproduced case. Done means both links render the same published page when opened in the graph output.

Written by the indexing model from the issue text.