added rst-content class to body

[PaarthAgarwal]

I have added rst-content class to the main body. I couldn't test this change as I mentioned in #20 (comment) but I believe it should fix #131.

[PaarthAgarwal]

Throwing the same error as I got while building docs. I believe it's happening because jinja2 has replaced contextfunction with pass_context.
Reference: https://stackoverflow.com/a/71634495

[PaarthAgarwal]

I found a PR that replaces the deprecated contextfunction with pass_context wagtail/wagtail#8203.

[lb-]

Looking great @PaarthAgarwal
the build issue should be resolved via this PR once merged #142

I checked your change locally and this does the job nicely, thank you.

[PaarthAgarwal]

Thanks, @lb-. Please see #20 (comment). I am unable to build docs for testing. Will this also resolve with #142?

[lb-]

Hey @PaarthAgarwal - hopefully the changes in 142 will help but if you get stuck maybe reach out on #support in slack and myself or someone might be able to help (feel free to ping me in Slack)