Typos and broken links in the Index page

1. Typo:
"Work with what you know and love. OpenWhisk supports a growing list of your favorite languages such as Go, Java, Rust and even newer, cloud-native ones **_like There is_** even an experimental runtime for Deno in-development."

2. Broken Links:
Weather's link is 404 (See https://github.com/apache/openwhisk-catalog/tree/master/packages/weather)
RSS and Jira are deprecated (See https://github.com/apache/openwhisk-package-rss & https://github.com/apache/openwhisk-package-jira)

Can I update this and open a PR?