Update all non-major dependencies

| datasource | package                    | from   | to     |
| ---------- | -------------------------- | ------ | ------ |
| pypi       | Pygments                   | 2.12.0 | 2.15.1 |
| pypi       | markdown                   | 3.3.7  | 3.4.3  |
| pypi       | mkdocs                     | 1.3.0  | 1.4.3  |
| pypi       | mkdocs-material            | 8.2.3  | 8.5.11 |
| pypi       | mkdocs-material-extensions | 1.0.3  | 1.1.1  |
| pypi       | pymdown-extensions         | 9.4    | 9.11   |


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

docs/requirements.txt

@@ -1,11 +1,11 @@
-mkdocs==1.3.0
+mkdocs==1.4.3
 mike==1.1.2
-markdown==3.3.7
-mkdocs-material==8.2.3
+markdown==3.4.3
+mkdocs-material==8.5.11
 
 # Markdown extensions
-Pygments==2.12.0
-pymdown-extensions==9.4
+Pygments==2.15.1
+pymdown-extensions==9.11
 
 # MkDocs plugins
-mkdocs-material-extensions==1.0.3
+mkdocs-material-extensions==1.1.1