chore(docs): bump pygments in /.github/workflows/mkdocs

Bumps [pygments](https://github.com/pygments/pygments) from 2.19.2 to 2.20.0.
- [Release notes](https://github.com/pygments/pygments/releases)
- [Changelog](https://github.com/pygments/pygments/blob/master/CHANGES)
- [Commits](pygments/pygments@2.19.2...2.20.0)

---
updated-dependencies:
- dependency-name: pygments
  dependency-version: 2.20.0
  dependency-type: indirect
...

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

Author: dependabot[bot]

.github/workflows/mkdocs/requirements.txt

@@ -247,9 +247,9 @@ platformdirs==4.3.8 \
     --hash=sha256:3d512d96e16bcb959a814c9f348431070822a6496326a4be0911c40b5a74c2bc \
     --hash=sha256:ff7059bb7eb1179e2685604f4aaf157cfd9535242bd23742eadc3c13542139b4
     # via mkdocs-get-deps
-pygments==2.19.2 \
-    --hash=sha256:636cb2477cec7f8952536970bc533bc43743542f70392ae026374600add5b887 \
-    --hash=sha256:86540386c03d588bb81d44bc3928634ff26449851e99741617ecb9037ee5ec0b
+pygments==2.20.0 \
+    --hash=sha256:6757cd03768053ff99f3039c1a36d6c0aa0b263438fcab17520b30a303a82b5f \
+    --hash=sha256:81a9e26dd42fd28a23a2d169d86d7ac03b46e2f8b59ed4698fb4785f946d0176
     # via mkdocs-material
 pymdown-extensions==10.16.1 \
     --hash=sha256:aace82bcccba3efc03e25d584e6a22d27a8e17caa3f4dd9f207e49b787aa9a91 \