Merge pull request #480 from puppetlabs/pdksync_GH-cat-12/main/add_redhat_9_support

pdksync - (GH-cat-12) Add Support for Redhat 9

Author: LukasAud

metadata.json

@@ -19,7 +19,8 @@
       "operatingsystemrelease": [
         "6",
         "7",
-        "8"
+        "8",
+        "9"
       ]
     },
     {