fix: use master or main for production env

Signed-off-by: Cédric OLIVIER <cedric3.olivier@orange.com>

templates/gitlab-ci-angular.yml

@@ -40,7 +40,7 @@ variables:
   NG_BUILD_ARGS: "build --prod"
 
   # default production ref name (pattern)
-  PROD_REF: '/^master$/'
+  PROD_REF: '/^(master|main)$/'
   # default integration ref name (pattern)
   INTEG_REF: '/^develop$/'