Build: Bump mkdocs from 1.4.2 to 1.4.3 in /python (#7602)

Bumps [mkdocs](https://github.com/mkdocs/mkdocs) from 1.4.2 to 1.4.3.
- [Release notes](https://github.com/mkdocs/mkdocs/releases)
- [Commits](mkdocs/mkdocs@1.4.2...1.4.3)

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

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

python/mkdocs/requirements.txt

@@ -15,7 +15,7 @@
 # specific language governing permissions and limitations
 # under the License.
 
-mkdocs==1.4.2
+mkdocs==1.4.3
 griffe==0.27.5
 jinja2==3.1.2
 mkdocstrings==0.21.2