⬆️ Updates Pygments to v2.20.0 [SECURITY]

Signed-off-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>

Author: renovate[bot]

docs/requirements_frozen.txt

@@ -1,7 +1,7 @@
 Jinja2==3.0.3
 click-man==0.4.1
 mkdocs==1.2.3
-Pygments==2.12.0
+Pygments==2.20.0
 mkdocs-material==8.2.7
 Markdown==3.3.6
 markdown-checklist==0.4.3