pip in / for mkdocs-material, mkdocstrings[python], frequenz-repo-config[lib], pytest, frequenz-repo-config[extra-lint-examples] - Update #1139557293

pip in / for mkdocs-material, mkdocstrings[python], frequenz-repo-config[lib], pytest, frequenz-repo-config[extra-lint-examples] - Update #1139557293 #4