Bump mkdocstrings to 1.0.7

pymdown-extensions 12.2 made `md` a required argument of
`Highlight.__init__`, which mkdocstrings 1.0.6 doesn't pass, so the docs
build fails. mkdocstrings 1.0.7 is compatible.

Signed-off-by: cwasicki <126617870+cwasicki@users.noreply.github.com>

Author: cwasicki

pyproject.toml

@@ -72,7 +72,7 @@ dev-mkdocs = [
   "mkdocs-literate-nav == 0.6.3",
   "mkdocs-macros-plugin == 1.5.0",
   "mkdocs-material == 9.7.7",
-  "mkdocstrings[python] == 1.0.6",
+  "mkdocstrings[python] == 1.0.7",
   "mkdocstrings-python == 2.0.9",
   "frequenz-repo-config[lib] == 0.19.0",
 ]