Bump markdownify from 0.11.2 to 0.14.1 in /requirements

Bumps [markdownify](https://github.com/matthewwithanm/python-markdownify) from 0.11.2 to 0.14.1.
- [Release notes](https://github.com/matthewwithanm/python-markdownify/releases)
- [Commits](matthewwithanm/python-markdownify@0.11.2...0.14.1)

---
updated-dependencies:
- dependency-name: markdownify
  dependency-version: 0.14.1
  dependency-type: direct:production
...

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

Author: dependabot[bot]

requirements/base.txt

@@ -15,7 +15,7 @@ ruamel.yaml==0.18.12
 
 # hypernode/ requirements
 beautifulsoup4==4.11.1
-markdownify==0.11.2
+markdownify==0.14.1
 python-slugify==6.1.2
 pyyaml==5.1
 frontmatter==3.0.7