Merge pull request #231 from TinkerTools/dependabot/pip/doc/manual/pygments-2.15.0

Bump pygments from 2.12.0 to 2.15.0 in /doc/manual

Author: jayponder

doc/manual/requirements.txt

@@ -16,7 +16,7 @@ packaging==21.3
 pybtex==0.24.0
 pybtex-docutils==1.0.2
 pydata-sphinx-theme==0.8.1
-Pygments==2.12.0
+Pygments==2.15.0
 pyparsing==3.0.9
 pytz==2022.1
 PyYAML==6.0