Bump markdown-callouts from 0.3.0 to 0.4.0 in /docs

Bumps [markdown-callouts](https://github.com/oprypin/markdown-callouts) from 0.3.0 to 0.4.0.
- [Release notes](https://github.com/oprypin/markdown-callouts/releases)
- [Commits](oprypin/markdown-callouts@v0.3.0...v0.4.0)

---
updated-dependencies:
- dependency-name: markdown-callouts
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

docs/requirements.txt

@@ -1,4 +1,4 @@
 mkdocs==1.5.3
 mkdocs-include-markdown-plugin==6.0.4
-markdown-callouts==0.3.0
+markdown-callouts==0.4.0
 mkdocs-mermaid2-plugin==1.1.1