feat: set BUILD_NUMBER, 2nd try

.github/workflows/build.yml

@@ -26,16 +26,18 @@ jobs:
     - name: Setup Gradle
       uses: gradle/actions/setup-gradle@v3
 
+    - name: Add SHORT_SHA env property with commit short sha
+      run: echo "SHORT_SHA=`echo ${GITHUB_SHA} | cut -c1-8`" >> $GITHUB_ENV
+
     - name: Build with Gradle Wrapper
       run: ./gradlew shadowJar
-
-    - name: Set BUILD_NUMBER
-      run: echo "BUILD_NUMBER=PR-${{ github.event.number }}-${{ github.sha }}" >> $GITHUB_ENV
+      env:
+        BUILD_NUMBER: 'PR-${{ github.event.number }}-${{ env.SHORT_SHA }}'
 
     - name: Upload build
       uses: actions/upload-artifact@v4.3.3
       with:
-        name: 'DeluxeMenus build PR-${{ github.event.number }} (commit ${{ github.sha }})'
+        name: 'DeluxeMenus build PR-${{ github.event.number }}-commit ${{ env.SHORT_SHA }}'
         path: build/libs
 
     # NOTE: The Gradle Wrapper is the default and recommended way to run Gradle (https://docs.gradle.org/current/userguide/gradle_wrapper.html).