feat: preserve fixed upstream versions with fork suffixes

action.yml

@@ -6,7 +6,10 @@ inputs:
     required: false
     default: 'false'
   bump:
-    description: 'Force specific bump type (major, minor, or patch)'
+    description: 'Force specific bump type (major, minor, patch, or suffix)'
+    required: false
+  suffix:
+    description: 'Suffix label used when creating the first suffix'
     required: false
   prefix:
     description: 'Version prefix (default "v")'