build(deps): bump pygments from 2.19.2 to 2.20.0 in /requirements

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]

requirements/ci.txt

@@ -8,7 +8,7 @@ annotated-doc==0.0.4
     # via typer
 cachetools==7.0.3
     # via
-    #   -r requirements/tox.txt
+    #   -r tox.txt
     #   tox
 certifi==2026.2.25
     # via requests
@@ -18,19 +18,19 @@ click==8.3.1
     # via typer
 colorama==0.4.6
     # via
-    #   -r requirements/tox.txt
+    #   -r tox.txt
     #   tox
 coverage[toml]==7.13.4
     # via coveralls
 coveralls==4.1.0
-    # via -r requirements/ci.in
+    # via -r ci.in
 distlib==0.4.0
     # via
-    #   -r requirements/tox.txt
+    #   -r tox.txt
     #   virtualenv
 filelock==3.25.0
     # via
-    #   -r requirements/tox.txt
+    #   -r tox.txt
     #   python-discovery
     #   tox
     #   virtualenv
@@ -42,28 +42,28 @@ mdurl==0.1.2
     # via markdown-it-py
 packaging==26.0
     # via
-    #   -r requirements/tox.txt
+    #   -r tox.txt
     #   pyproject-api
     #   tox
 platformdirs==4.9.4
     # via
-    #   -r requirements/tox.txt
+    #   -r tox.txt
     #   python-discovery
     #   tox
     #   virtualenv
 pluggy==1.6.0
     # via
-    #   -r requirements/tox.txt
+    #   -r tox.txt
     #   tox
-pygments==2.19.2
+pygments==2.20.0
     # via rich
 pyproject-api==1.10.0
     # via
-    #   -r requirements/tox.txt
+    #   -r tox.txt
     #   tox
 python-discovery==1.1.0
     # via
-    #   -r requirements/tox.txt
+    #   -r tox.txt
     #   virtualenv
 requests==2.32.5
     # via coveralls
@@ -73,15 +73,15 @@ shellingham==1.5.4
     # via typer
 tomli-w==1.2.0
     # via
-    #   -r requirements/tox.txt
+    #   -r tox.txt
     #   tox
 tox==4.49.0
-    # via -r requirements/tox.txt
+    # via -r tox.txt
 typer==0.24.1
     # via coveralls
 urllib3==2.6.3
     # via requests
 virtualenv==21.1.0
     # via
-    #   -r requirements/tox.txt
+    #   -r tox.txt
     #   tox