Bump boto3 from 1.14.51 to 1.14.53 in /requirements (#15395)

Bumps [boto3](https://github.com/boto/boto3) from 1.14.51 to 1.14.53.
- [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/1.14.51...1.14.53)

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

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

requirements/prod.txt

@@ -142,9 +142,9 @@ bleach==3.1.5 \
     --hash=sha256:3c4c520fdb9db59ef139915a5db79f8b51bc2a7257ea0389f30c846883430a4b
 # 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==1.14.51 \
-    --hash=sha256:f9dbccbcec916051c6588adbccae86547308ac4cd154f1eb7cf6422f0e391a71 \
-    --hash=sha256:a6bdb808e948bd264af135af50efb76253e85732c451fa605b7a287faf022432
+boto3==1.14.53 \
+    --hash=sha256:defd1aa0bbc8eb9c3b6aefb5060972447f73a4f1c3ba995ba28d6f0b6b9059dd \
+    --hash=sha256:b240ac281de363e25a8e1a4c862559d6a056d98dcb9f487fc94d73c6f6599dfc
 # see last comment - celery is in between boto3 and botocore on purpose.
 celery==4.4.7 \
     --hash=sha256:a92e1d56e650781fb747032a3997d16236d037c8199eacd5217d1a72893bca45 \