chore(release): drop v prefix from action Dockerfile tag

Align the github-action base image tag with the new GHCR convention
introduced in v0.30.0 (no v prefix). The legacy :v0.30.0 tag remains
available via a one-shot manifest copy for any consumer still pinned
to it; future releases will publish only :X.Y.Z.

- github-action/Dockerfile: FROM ...:v0.30.0 -> ...:0.30.0
- scripts/version_common.cr: drop v from the extraction regex
- scripts/version_update.cr: regex tolerates legacy v? on input,
  replacement always writes the unprefixed form

Author: hahwul

github-action/Dockerfile

@@ -1,5 +1,5 @@
 # Use the OWASP Noir base image from GitHub Container Registry
-FROM ghcr.io/owasp-noir/noir:v0.30.0
+FROM ghcr.io/owasp-noir/noir:0.30.0
 
 # Install jq for JSON processing
 USER 0

scripts/version_common.cr

@@ -62,7 +62,7 @@ end
 
 # Extract version from github-action/Dockerfile
 def get_action_dockerfile_version : String?
-  match = File.read(ACTION_DOCKER).match(/FROM\s+ghcr\.io\/owasp-noir\/noir:v([\d.]+)/)
+  match = File.read(ACTION_DOCKER).match(/FROM\s+ghcr\.io\/owasp-noir\/noir:([\d.]+)/)
   match ? match[1] : nil
 rescue
   nil

scripts/version_update.cr

@@ -77,7 +77,7 @@ end
 # Update github-action/Dockerfile FROM tag
 def update_action_dockerfile_version(new_version : String) : Bool
   content = File.read(ACTION_DOCKER)
-  File.write(ACTION_DOCKER, content.gsub(/(FROM\s+ghcr\.io\/owasp-noir\/noir:)v[\d.]+/, "\\1v#{new_version}"))
+  File.write(ACTION_DOCKER, content.gsub(/(FROM\s+ghcr\.io\/owasp-noir\/noir:)v?[\d.]+/, "\\1#{new_version}"))
   true
 rescue ex
   STDERR.puts "  Error updating #{ACTION_DOCKER}: #{ex.message}"