Enable submodules in checkout steps

Added submodule support to the checkout steps.

Author: Stefterv

.github/workflows/build-gradle.yml

@@ -12,6 +12,8 @@ jobs:
     steps:
       - name: Checkout Repository
         uses: actions/checkout@v4
+        with:
+          submodules: true
       - name: Install Java
         uses: actions/setup-java@v4
         with:
@@ -64,6 +66,8 @@ jobs:
 
       - name: Checkout Repository
         uses: actions/checkout@v4
+        with:
+          submodules: true
       - name: Install Java
         uses: actions/setup-java@v4
         with:
@@ -86,4 +90,4 @@ jobs:
         with:
           name: processing-${{ matrix.os_prefix }}-${{ matrix.arch }}-br_${{ github.ref_name }}
           retention-days: 1
-          path: app/build/compose/binaries/main/${{ matrix.binary }}
+          path: app/build/compose/binaries/main/${{ matrix.binary }}