build(deps): bump pygments from 2.18.0 to 2.19.1 in /docs

Bumps [pygments](https://github.com/pygments/pygments) from 2.18.0 to 2.19.1.
- [Release notes](https://github.com/pygments/pygments/releases)
- [Changelog](https://github.com/pygments/pygments/blob/master/CHANGES)
- [Commits](pygments/pygments@2.18.0...2.19.1)

---
updated-dependencies:
- dependency-name: pygments
  dependency-version: 2.19.1
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

Author: dependabot[bot]

docs/requirements.txt

@@ -242,9 +242,9 @@ packaging==24.1 \
     # via
     #   readthedocs-sphinx-ext
     #   sphinx
-pygments==2.18.0 \
-    --hash=sha256:786ff802f32e91311bff3889f6e9a86e81505fe99f2735bb6d60ae0c5004f199 \
-    --hash=sha256:b8e6aca0523f3ab76fee51799c488e38782ac06eafcf95e7ba832985c8e7b13a
+pygments==2.19.1 \
+    --hash=sha256:61c16d2a8576dc0649d9f39e089b5f02bcd27fba10d8fb4dcc28173f7a45151f \
+    --hash=sha256:9ea1544ad55cecf4b8242fab6dd35a93bbce657034b0611ee383099054ab6d8c
     # via sphinx
 pyyaml==6.0.2 \
     --hash=sha256:01179a4a8559ab5de078078f37e5c1a30d76bb88519906844fd7bdea1b7729ff \