Make sure tags aren't rendered inside a guide

[aliabd]

Tags are getting rendered inside a guide, this fixes that. Also cleans up some small markdown issues / broken links with a few guides.

Closes this from #4804:

• tags should be filtered out of guides

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Name	Status	Preview	Updated (UTC)
gradio	✅ Ready (Inspect)	Visit Preview	Jul 24, 2023 8:50pm

[gradio-pr-bot]

🦄 change detected

This Pull Request includes changes to the following packages.

Package	Version
website	patch

• Maintainers can select this checkbox to manually select packages to update.

With the following changelog entry.

Make sure tags aren't rendered inside a guide

Maintainers or the PR author can modify the PR title to modify this entry.

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[gradio-pr-bot]

All the demos for this PR have been deployed at https://huggingface.co/spaces/gradio-pr-deploys/pr-5007-all-demos

---

You can install the changes in this PR by running:

pip install https://gradio-builds.s3.amazonaws.com/3e70fc81fc12dcb07f40a280b972a61348c9d263/gradio-3.38.0-py3-none-any.whl