Bump boto3 from 1.16.38 to 1.16.39 (#2038)

Bumps [boto3](https://github.com/boto/boto3) from 1.16.38 to 1.16.39.
- [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/1.16.38...1.16.39)

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

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

requirements.txt

@@ -1,5 +1,5 @@
 adr==0.19.4
-boto3==1.16.38
+boto3==1.16.39
 imbalanced-learn==0.7.0
 libmozdata==0.1.68
 lmdb==0.99