mypy: docs/source/conf.my: Fix mypy warnings

Signed-off-by: Bernhard Kaindl <bernhard.kaindl@cloud.com>

Author: bernhardkaindl

docs/source/conf.py

@@ -48,7 +48,7 @@
 
 myst_heading_anchors = 2
 templates_path = ["_templates"]
-exclude_patterns = []
+exclude_patterns: list[str] = []
 
 
 # -- Options for HTML output -------------------------------------------------