Bump mkdocs from 1.5.0 to 1.5.1

Bumps [mkdocs](https://github.com/mkdocs/mkdocs) from 1.5.0 to 1.5.1.
- [Release notes](https://github.com/mkdocs/mkdocs/releases)
- [Commits](mkdocs/mkdocs@1.5.0...1.5.1)

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

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

requirements.prod.txt

@@ -191,9 +191,9 @@ mergedeep==1.3.4 \
     --hash=sha256:0096d52e9dad9939c3d975a774666af186eda617e6ca84df4c94dec30004f2a8 \
     --hash=sha256:70775750742b25c0d8f36c55aed03d24c3384d17c951b3175d898bd778ef0307
     # via mkdocs
-mkdocs==1.5.0 \
-    --hash=sha256:91a75e3a5a75e006b2149814d5c56af170039ceda0732f51e7af1a463599c00d \
-    --hash=sha256:ff54eac0b74bf39a2e91f179e2ac16ef36f0294b9ab161c22f564382b30a31ae
+mkdocs==1.5.1 \
+    --hash=sha256:67e889f8d8ba1fe5decdfc59f5f8f21d6a8925a129339e93dede303bdea03a98 \
+    --hash=sha256:f2f323c62fffdf1b71b84849e39aef56d6852b3f0a5571552bca32cefc650209
     # via
     #   -r requirements.prod.in
     #   mkdocs-autorefs