remove duplicated tags and point them to focal images

Signed-off-by: Mikael Arguedas <[email protected]>

library/gazebo

@@ -84,12 +84,12 @@ Directory: gazebo/10/ubuntu/bionic/libgazebo10
 ########################################
 # Distro: ubuntu:bionic
 
-Tags: gzserver11, gzserver11-bionic
+Tags: gzserver11-bionic
 Architectures: amd64
 GitCommit: 6f18102d57b424ce454f61e4ac432e3d6d71f670
 Directory: gazebo/11/ubuntu/bionic/gzserver11
 
-Tags: libgazebo11, libgazebo11-bionic
+Tags: libgazebo11-bionic
 Architectures: amd64
 GitCommit: 6f18102d57b424ce454f61e4ac432e3d6d71f670
 Directory: gazebo/11/ubuntu/bionic/libgazebo11