Update typing from 3.6.2 to 3.6.4 (#7391)

requirements/docs.txt

@@ -51,10 +51,10 @@ sphinx-rtd-theme==0.2.4 \
     --hash=sha256:62ee4752716e698bad7de8a18906f42d33664128eea06c46b718fc7fbd1a9f5c \
     --hash=sha256:2df74b8ff6fae6965c527e97cca6c6c944886aae474b490e17f92adfbe843417
 # typing is required by Sphinx
-typing==3.6.2 \
-    --hash=sha256:349b1f9c109c84b53ac79ac1d822eaa68fc91d63b321bd9392df15098f746f53 \
-    --hash=sha256:63a8255fe7c6269916baa440eb9b6a67139b0b97a01af632e7bd2842e1e02f15 \
-    --hash=sha256:d514bd84b284dd3e844f0305ac07511f097e325171f6cc4a20878d11ad771849
+typing==3.6.4 \
+    --hash=sha256:b2c689d54e1144bbcfd191b0832980a21c2dbcf7b5ff7a66248a60c90e951eb8 \
+    --hash=sha256:3a887b021a77b292e151afb75323dea88a7bc1b3dfa92176cff8e44c8b68bddf \
+    --hash=sha256:d400a9344254803a2368533e4533a4200d21eb7b6b729c173bc38201a74db3f2
 sphinxcontrib-websupport==1.0.1 \
     --hash=sha256:7a85961326aa3a400cd4ad3c816d70ed6f7c740acd7ce5d78cd0a67825072eb9 \
     --hash=sha256:f4932e95869599b89bf4f80fc3989132d83c9faa5bf633e7b5e0c25dffb75da2