Bump boto3 from 1.17.2 to 1.17.4 in /requirements (#16502)

Bumps [boto3](https://github.com/boto/boto3) from 1.17.2 to 1.17.4.
- [Release notes](https://github.com/boto/boto3/releases)
- [Changelog](https://github.com/boto/boto3/blob/develop/CHANGELOG.rst)
- [Commits](https://github.com/boto/boto3/compare/1.17.2...1.17.4)

Signed-off-by: dependabot[bot] <support@github.com>

Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

requirements/prod.txt

@@ -151,9 +151,9 @@ bleach==3.3.0 \
     --hash=sha256:98b3170739e5e83dd9dc19633f074727ad848cbedb6026708c8ac2d3b697a433
 # REMEMBER: leave a few lines between boto3 and botocore requirements to avoid an
 # annoying merge conflict every day when pyup generates prs for both.
-boto3==1.17.2 \
+boto3==1.17.4 \
-    --hash=sha256:6a7f9e2fb631d39bd089cb7e83b4a8ce5e572bdc6545ac51b761bd9ea2ad80c6 \
+    --hash=sha256:af87efaa772f95de67f72ed91aed2feef63593b5290696f669799202bc484b99 \
-    --hash=sha256:1a282c1cd7d5028cbb3a75d747df32162295253f55d263ac85840e264830963b
+    --hash=sha256:65514427f5f849245c9a272fa06a5a014ae3945333f4f407489d034fb99dc61f
 # see last comment - celery is in between boto3 and botocore on purpose.
 celery==4.4.7 \
     --hash=sha256:a92e1d56e650781fb747032a3997d16236d037c8199eacd5217d1a72893bca45 \