Few more small fixes found during preparation of the backports (#11848)

dev/README.md

@@ -905,13 +905,13 @@ though they should be generated from the same sources.
 this will clean up dist folder before generating the packages, so you will only have the right packages there.
 
 ```shell script
-./breeze prepare-provider-packages --version-suffix-for-pypi rc1
+./breeze --backports prepare-provider-packages --version-suffix-for-pypi rc1
 ```
 
 if you ony build few packages, run:
 
 ```shell script
-./breeze prepare-provider-packages --version-suffix-for-pypi rc1 PACKAGE PACKAGE ....
+./breeze --backports prepare-provider-packages --version-suffix-for-pypi rc1 PACKAGE PACKAGE ....
 ```
 
 * Verify the artifacts that would be uploaded:

provider_packages/build_source_package.sh

@@ -141,7 +141,7 @@ check_version
 
 export ARCHIVE_FILE_NAME="apache-airflow-${BACKPORT_PREFIX}providers-${VERSION}-source.tar.gz"
 
-#tag_release
+tag_release
 clean_repo
 prepare_archive
 prepare_combined_changelog