deploy/playbooks/roles/common/templates: add squid

Based on https://docs.ceph.com/en/latest/dev/release-process/#new-major-releases,
this commit updates Chacra of squid's existence.

Signed-off-by: Laura Flores <lflores@ibm.com>

Author: Laura Flores

deploy/playbooks/roles/common/templates/prod.py.j2

@@ -294,6 +294,10 @@ repos = {
             'ceph-release': ['reef'],
             'ceph-deploy': ['main'],
         },
+        'squid': {
+            'ceph-release': ['squid'],
+            'ceph-deploy': ['main'],
+        },
         # when more 'testing' refs are built, we need to add them here as well
         'testing': {
             'ceph': ['jewel-rc'],