Bump pygments in /IBPSA/Resources/src/fluid/heatpumps/calibration/doc

Bumps [pygments](https://github.com/pygments/pygments) from 2.15.0 to 2.20.0.
- [Release notes](https://github.com/pygments/pygments/releases)
- [Changelog](https://github.com/pygments/pygments/blob/master/CHANGES)
- [Commits](pygments/pygments@2.15.0...2.20.0)

---
updated-dependencies:
- dependency-name: pygments
  dependency-version: 2.20.0
  dependency-type: direct:production
...

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

Author: dependabot[bot]

IBPSA/Resources/src/fluid/heatpumps/calibration/doc/requirements.txt

@@ -11,7 +11,7 @@ MarkupSafe==2.1.0
 packaging==21.3
 pybtex==0.24.0
 pybtex-docutils==1.0.1
-Pygments==2.15.0
+Pygments==2.20.0
 pyparsing==3.0.7
 pytz==2021.3
 PyYAML==6.0