Bump boto3 in /internal/buildscripts/packaging/release (open-telemetr…

…y#1014)

Bumps [boto3](https://github.com/boto/boto3) from 1.20.20 to 1.20.21.
- [Release notes](https://github.com/boto/boto3/releases)
- [Changelog](https://github.com/boto/boto3/blob/develop/CHANGELOG.rst)
- [Commits](boto/boto3@1.20.20...1.20.21)

---
updated-dependencies:
- dependency-name: boto3
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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

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

internal/buildscripts/packaging/release/requirements.txt

@@ -1,4 +1,4 @@
 PyGithub==1.55
-boto3==1.20.20
+boto3==1.20.21
 docker==5.0.3
 requests==2.26.0