docs: fix documented mypy version in tox (#36550)

Author: NiklasvonM

CONTRIBUTING.md

@@ -47,7 +47,7 @@ sdist            -> Builds a source distribution and runs tests
 additional environments:
 pylint           -> Lints a package with a pinned version of pylint
 next-pylint      -> Lints a package with pylint (version 2.15.8)
-mypy             -> Typechecks a package with mypy (version 1.0.0)
+mypy             -> Typechecks a package with mypy (version 1.9.0)
 next-mypy        -> Typechecks a package with the latest version of mypy
 pyright          -> Typechecks a package with pyright (version 1.1.287)
 next-pyright     -> Typechecks a package with the latest version of static type-checker pyright

doc/dev/static_type_checking.md

@@ -183,15 +183,15 @@ environment run in CI and brings in the third party stub packages necessary. To
 
 ### Run mypy
 
-mypy is currently pinned to version [1.0.0](https://pypi.org/project/mypy/1.0.0/).
+mypy is currently pinned to version [1.9.0](https://pypi.org/project/mypy/1.9.0/).
 
 To run mypy on your library, run the tox mypy env at the package level:
 
 `.../azure-sdk-for-python/sdk/textanalytics/azure-ai-textanalytics>tox run -e mypy -c ../../../eng/tox/tox.ini --root .`
 
 If you don't want to use `tox` you can also install and run mypy on its own:
 
-`pip install mypy==1.0.0`
+`pip install mypy==1.9.0`
 
 `.../azure-sdk-for-python/sdk/textanalytics/azure-ai-textanalytics>mypy azure`