📖Fix typo in AMP Variable Substitutions documentation

[mattwomple]

<amp-pixel> was missing > on its opening tag.

[mattwomple]

CC @ampproject/wg-outreach

[CrystalOnScript]

Thanks for the fix!

[mattwomple]

Anything delaying merge on this one? Thanks!

[mrjoro]

Adding a review comment to restart the owners bot!

[mrjoro]

Oh and approving since it needs a Reviewer approval.

[rcebulko]

Test comment

[rcebulko]

The owners bot is WAI. This PR does not have owners approval (spec has no OWNERS files, so this requires one of the top-level owners). It's possible ampproject/wg-outreach should own all MD files (not just those in root), which #25075 does.

[mrjoro]

Once #25075 goes in, @CrystalOnScript's approval will count as an OWNER approval, so it should be ready to merge.

Thanks for your patience as we work through some of the last issues with the Owners/Reviewers checks!

[rcebulko]

rerun owners

[mrjoro]

Woo! It looks like it's ready to merge now. @mattwomple use your powers!

[mattwomple]

Woo! It looks like it's ready to merge now. @mattwomple use your powers!

Thanks @mrjoro but I don't think Collaborators actually have write access. I still see "The base branch restricts merging to authorized users." and the email from github reads:

You’ve been added to the Collaborators (amphtml) team for the AMP organization. Collaborators (amphtml) has 13 members and gives *read* access to 2 ampproject repositories.

[mrjoro]

OK, I think it should (hopefully) work now... there was one more setting we needed to adjust. :)

If it still doesn't work, we may need to wait for the permissions to propagate. But let's see...

[rsimha]

I love the entire sequence of events in this PR! Glad to have you as a collaborator, @mattwomple!