fix: Remove slash from APK name

.github/workflows/debug_build.yml

@@ -3,6 +3,8 @@ on:
   push:
     branches:
       - '**'
+env:
+  BRANCH_NAME: ${{ github.head_ref || github.ref_name }}
 
 jobs:
   build:
@@ -55,8 +57,14 @@ jobs:
       - name: Build debug APK
         run: ./gradlew assembleDebug
 
+      - name: Set MODIFIED_BRANCH_NAME
+        env:
+          name: "${{env.BRANCH_NAME}}"
+        run: |
+          echo "MODIFIED_BRANCH_NAME=${name/\//-}" >> $GITHUB_ENV
+
       - name: Upload debug APK
         uses: actions/upload-artifact@v4
         with:
-          name: Koreatech-Board-${{ github.ref_name }}-debug
+          name: Koreatech-Board-${{ env.MODIFIED_BRANCH_NAME }}-debug
           path: app/build/outputs/apk/debug/