Bump waitress from 1.3.0 to 1.3.1 (#6544)

Bumps [waitress](https://github.com/Pylons/waitress) from 1.3.0 to 1.3.1.
- [Release notes](https://github.com/Pylons/waitress/releases)
- [Changelog](https://github.com/Pylons/waitress/blob/master/HISTORY.txt)
- [Commits](Pylons/waitress@v1.3.0...v1.3.1)

Signed-off-by: dependabot-preview[bot] <[email protected]>

Author: dependabot-preview[bot]

requirements/tests.txt

@@ -140,9 +140,9 @@ text-unidecode==1.2 \
 urllib3==1.25.3 \
     --hash=sha256:b246607a25ac80bedac05c6f282e3cdaf3afb65420fd024ac94435cabe6e18d1 \
     --hash=sha256:dbe59173209418ae49d485b87d1681aefa36252ee85884c31346debd19463232
-waitress==1.3.0 \
-    --hash=sha256:4e2a6e6fca56d6d3c279f68a2b2cc9b4798d834ea3c3a9db3e2b76b6d66f4526 \
-    --hash=sha256:90fe750cd40b282fae877d3c866255d485de18e8a232e93de42ebd9fb750eebb
+waitress==1.3.1 \
+    --hash=sha256:278e09d6849acc1365404bbf7d790d0423b159802e850c726e8cd0a126a2dac7 \
+    --hash=sha256:f103e557725b17ae3c62f9e6005cdd85103f8b68fa86cf7c764ba7adc38ca5a2
 wcwidth==0.1.7 \
     --hash=sha256:3df37372226d6e63e1b1e1eda15c594bca98a22d33a23832a90998faa96bc65e \
     --hash=sha256:f4ebe71925af7b40a864553f761ed559b43544f8f71746c2d756c7fe788ade7c