Add trigger on pull request

.github/workflows/build.yml

@@ -6,6 +6,9 @@ on:
       - main
     paths:
       - 'module/**'
+  pull_request:
+    paths:
+      - 'module/**'
   workflow_dispatch:
 
 jobs:
@@ -40,6 +43,9 @@ jobs:
       - name: Check if valid to release
         id: check_tag
         run: |
+          if [ "${{ github.event_name }}" = "pull_request" ]; then
+            echo "version_tag_exists=true" >> $GITHUB_OUTPUT
+          else
             VERSION=$(grep '^version=' module/module.prop | sed 's/version=//')
             git fetch --tags
             if git tag | grep -qx "^$VERSION"; then
@@ -47,6 +53,7 @@ jobs:
             else
               echo "version_tag_exists=false" >> $GITHUB_OUTPUT
             fi
+          fi
 
   release:
     name: release