Bump azure-common from 1.1.26 to 1.1.28

Bumps [azure-common](https://github.com/Azure/azure-sdk-for-python) from 1.1.26 to 1.1.28.
- [Release notes](https://github.com/Azure/azure-sdk-for-python/releases)
- [Commits](Azure/azure-sdk-for-python@azure-common_1.1.26...azure-common_1.1.28)

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

Signed-off-by: dependabot[bot] <[email protected]>

requirements.txt

@@ -6,7 +6,7 @@ cryptography==3.4.6
 chardet==4.0.0
 idna
 azure-core==1.25.0
-azure-common==1.1.26
+azure-common==1.1.28
 azure-nspkg==3.0.2
 azure-functions==1.6.0
 azure-storage-common==2.1.0