Update actions for recursive submodules.

.github/workflows/build.yml

@@ -12,7 +12,7 @@ jobs:
     steps:
       - uses: actions/checkout@v2
         with:
-          submodules: true
+          submodules: recursive
       - name: Setup .NET
         uses: actions/setup-dotnet@v1
         with:

.github/workflows/release.yml

@@ -11,7 +11,7 @@ jobs:
     steps:
       - uses: actions/checkout@v2
         with:
-          submodules: true
+          submodules: recursive
       - name: Setup .NET
         uses: actions/setup-dotnet@v1
         with:

.github/workflows/test_release.yml

@@ -11,7 +11,7 @@ jobs:
     steps:
       - uses: actions/checkout@v2
         with:
-          submodules: true
+          submodules: recursive
       - name: Setup .NET
         uses: actions/setup-dotnet@v1
         with: