chore(deps): bump mkdocs-material from 9.6.14 to 9.6.15 in /docs (#6920)

Bumps [mkdocs-material](https://github.com/squidfunk/mkdocs-material) from 9.6.14 to 9.6.15.
- [Release notes](https://github.com/squidfunk/mkdocs-material/releases)
- [Changelog](https://github.com/squidfunk/mkdocs-material/blob/master/CHANGELOG)
- [Commits](squidfunk/mkdocs-material@9.6.14...9.6.15)

---
updated-dependencies:
- dependency-name: mkdocs-material
  dependency-version: 9.6.15
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

Signed-off-by: dependabot[bot] <support@github.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>
Co-authored-by: Leandro Damascena <lcdama@amazon.pt>

Author: dependabot[bot]

docs/requirements.in

@@ -1,4 +1,4 @@
 mkdocs-git-revision-date-plugin==0.3.2
 mkdocstrings-python==1.16.12
 mkdocs-llmstxt==0.2.0
-mkdocs-material==9.6.14
+mkdocs-material==9.6.15

docs/requirements.txt

@@ -282,9 +282,9 @@ mkdocs-llmstxt==0.2.0 \
     --hash=sha256:104f10b8101167d6baf7761942b4743869be3d8f8a8d909f4e9e0b63307f709e \
     --hash=sha256:907de892e0c8be74002e8b4d553820c2b5bbcf03cc303b95c8bca48fb49c1a29
     # via -r requirements.in
-mkdocs-material==9.6.14 \
-    --hash=sha256:39d795e90dce6b531387c255bd07e866e027828b7346d3eba5ac3de265053754 \
-    --hash=sha256:3b9cee6d3688551bf7a8e8f41afda97a3c39a12f0325436d76c86706114b721b
+mkdocs-material==9.6.15 \
+    --hash=sha256:64adf8fa8dba1a17905b6aee1894a5aafd966d4aeb44a11088519b0f5ca4f1b5 \
+    --hash=sha256:ac969c94d4fe5eb7c924b6d2f43d7db41159ea91553d18a9afc4780c34f2717a
     # via -r requirements.in
 mkdocs-material-extensions==1.3.1 \
     --hash=sha256:10c9511cea88f568257f960358a467d12b970e1f7b2c0e5fb2bb48cab1928443 \