CI fixes

Author: mdecimus

.github/workflows/build.yml

@@ -50,6 +50,7 @@ jobs:
         uses: actions/checkout@v2
         with:
           persist-credentials: false
+          submodules: recursive
 
       - name: Install dependencies (Linux)
         if: ${{ contains(matrix.host_os, 'ubuntu') }}
@@ -113,6 +114,8 @@ jobs:
             target: aarch64-unknown-linux-gnu
     steps:
       - uses: actions/checkout@v3
+        with:
+          submodules: recursive
       - uses: uraimo/run-on-arch-action@v2
         name: Build artifact
         id: build
@@ -181,6 +184,8 @@ jobs:
       -
         name: Checkout
         uses: actions/checkout@v3
+        with:
+          submodules: recursive
       -
         name: Docker meta
         id: meta