ci: add patterns for milestones and release candidates

Author: jac3km4

.github/workflows/release.yml

@@ -4,6 +4,8 @@ on:
   push:
     tags:
       - "v[0-9]+.[0-9]+.[0-9]+"
+      - "v[0-9]+.[0-9]+.[0-9]+-M[0-9]+"
+      - "v[0-9]+.[0-9]+.[0-9]+-RC[0-9]+"
 
 env:
   CARGO_INCREMENTAL: 0