Checkout submodules for CI jobs that need them

Author: Nemo157

.github/workflows/ci.yml

@@ -23,6 +23,8 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@v3
+        with:
+          submodules: true
       - id: install
         run: |
           rustup override set stable
@@ -141,6 +143,8 @@ jobs:
 
     steps:
       - uses: actions/checkout@v3
+        with:
+          submodules: true
       - id: install
         run: |
           rustup override set stable

.github/workflows/docker.yml

@@ -8,6 +8,8 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@v3
+        with:
+          submodules: true
 
       - name: Build the Docker image
         run: docker build -t docs-rs -f dockerfiles/Dockerfile .