Fix: Configure Axion Release plugin to accept 'v' prefix in tags

Update tag prefix from '' to 'v' to match standard versioning convention
used across other Rundeck repositories (v1.2.0, v1.3.0, etc.)

Co-authored-by: Cursor <cursoragent@cursor.com>

Author: fdevans

build.gradle

@@ -38,7 +38,7 @@ repositories {
 scmVersion {
     ignoreUncommittedChanges = false
     tag {
-        prefix = ''
+        prefix = 'v'
         versionSeparator = ''
     }
 }