Bump markupsafe from 2.1.4 to 2.1.5

Bumps [markupsafe](https://github.com/pallets/markupsafe) from 2.1.4 to 2.1.5.
- [Release notes](https://github.com/pallets/markupsafe/releases)
- [Changelog](https://github.com/pallets/markupsafe/blob/main/CHANGES.rst)
- [Commits](pallets/markupsafe@2.1.4...2.1.5)

---
updated-dependencies:
- dependency-name: markupsafe
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

Signed-off-by: dependabot[bot] <[email protected]>

requirements.txt

@@ -6,7 +6,7 @@ idna==3.6
 Jinja2==3.1.3
 Markdown==3.5.2
 markdown-it-py==3.0.0
-MarkupSafe==2.1.4
+MarkupSafe==2.1.5
 mdurl==0.1.2
 ordered-set==4.1.0
 pelican==4.9.1