[3.10] bpo-45655: Add "relevant PEPs" section to typing documentation

Backport of python#29280 to the 3.10 branch.

Author: AlexWaygood

Doc/tools/susp-ignored.csv

@@ -376,7 +376,7 @@ library/importlib.metadata,,:main,"EntryPoint(name='wheel', value='wheel.cli:mai
 library/importlib.metadata,,`,loading the metadata for packages for the indicated ``context``.
 library/re,,`,"`"
 using/configure,84,:db2,=db1:db2:...
-library/typing,1011,`,# Type of ``val`` is narrowed to ``str``
-library/typing,1011,`,"# Else, type of ``val`` is narrowed to ``float``."
-library/typing,1011,`,# Type of ``val`` is narrowed to ``List[str]``.
-library/typing,1011,`,# Type of ``val`` remains as ``List[object]``.
+library/typing,,`,# Type of ``val`` is narrowed to ``str``
+library/typing,,`,"# Else, type of ``val`` is narrowed to ``float``."
+library/typing,,`,# Type of ``val`` is narrowed to ``List[str]``.
+library/typing,,`,# Type of ``val`` remains as ``List[object]``.