chore(deps): bump html2rss in the rubygems group (#780)

Bumps the rubygems group with 1 update: [html2rss](https://github.com/html2rss/html2rss).


Updates `html2rss` from `45ad17b` to `f12dff5`
- [Release notes](https://github.com/html2rss/html2rss/releases)
- [Commits](html2rss/html2rss@45ad17b...f12dff5)

---
updated-dependencies:
- dependency-name: html2rss
  dependency-version: f12dff5b22f88de98999e9db8b366254b6ef9efd
  dependency-type: direct:production
  dependency-group: rubygems
...

Signed-off-by: dependabot[bot] <[email protected]>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Author: dependabot[bot]

Gemfile.lock

@@ -1,6 +1,6 @@
 GIT
   remote: https://github.com/html2rss/html2rss
-  revision: 45ad17b506088c683e33d2afddcd8bddbe2e9a7f
+  revision: f12dff5b22f88de98999e9db8b366254b6ef9efd
   specs:
     html2rss (0.17.0)
       addressable (~> 2.7)