Update boto3 requirement from ==1.26.* to >=1.26,<1.29 (#313)

Updates the requirements on [boto3](https://github.com/boto/boto3) to permit the latest version.
- [Release notes](https://github.com/boto/boto3/releases)
- [Changelog](https://github.com/boto/boto3/blob/develop/CHANGELOG.rst)
- [Commits](boto/boto3@1.26.0...1.28.0)

---
updated-dependencies:
- dependency-name: boto3
  dependency-type: direct:production
...

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

Author: dependabot[bot]

requirements.txt

@@ -1,4 +1,4 @@
-boto3 == 1.26.*
+boto3 >= 1.26,< 1.29
 ftfy == 6.1.1
 mailchecker == 5.0.9
 openpyxl == 3.1.2