Add 2.1 release branch of gsb_fpp_xray.
Add 2.3 release of gsb_public_custom_blocks.
Add 2.0 release branch of gsb_feature_social_feed.
Forgot the release- prefix.
Add the 2.0 release branch or gsb_feature_msx_fellows_ct.
Add the 2.0 release branch or gsb_feature_staff_ct.
Change to 2.3 tag of gsb_public_custom_blocks.
Change to 2.1 tag of gsb_fpp_xray.
Change to 2.0 tag of gsb_feature_msx_fellows_ct.
Change to 2.1 tag of gsb_feature_phd_candidate_ct.
Change to 2.0 tag of gsb_feature_social_feed.
Change to 2.0 tag of gsb_feature_staff_ct.