Update README again (#1630)

There's a rule for when a branch is merged for factory_bot.
I tried removing `[ci-skip]` from the original workflow
to trigger all CI actions. It didn't work, still got the same error:

```
remote: error: GH006: Protected branch update failed for refs/heads/main.
remote: error: Required status check "Run standard" is expected.
To https://github.com/thoughtbot/factory_bot.git
 ! [remote rejected] main -> main (protected branch hook declined)
```

Gonna try going through the PR workflow to see if the rule
gets happy.

Author: sbs-cats

README.md

@@ -82,7 +82,6 @@ software, and may be redistributed under the terms specified in the
 [LICENSE]: https://github.com/thoughtbot/factory_bot/blob/main/LICENSE
 
 <!-- START /templates/footer.md -->
-
 <!-- END /templates/footer.md -->
 
 [ci-image]: https://github.com/thoughtbot/factory_bot/actions/workflows/build.yml/badge.svg?branch=main