chore(deps): bump zensical from 0.0.47 to 0.0.50

Bumps [zensical](https://github.com/zensical/zensical) from 0.0.47 to 0.0.50.
- [Release notes](https://github.com/zensical/zensical/releases)
- [Commits](zensical/zensical@v0.0.47...v0.0.50)

---
updated-dependencies:
- dependency-name: zensical
  dependency-version: 0.0.50
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

Signed-off-by: dependabot[bot] <support@github.com>

Author: dependabot[bot]

requirements.txt

@@ -1,3 +1,3 @@
-zensical==0.0.47
+zensical==0.0.50
 # https://github.com/zensical/backlog/issues/18
 mkdocs-git-revision-date-localized-plugin==1.5.3