.github: enable submodules sync for actions/checkout@v3

Signed-off-by: Anna Shaleva <shaleva.ann@nspcc.ru>

.github/workflows/run_tests.yml

@@ -94,11 +94,7 @@ jobs:
       - uses: actions/checkout@v3
         with:
           fetch-depth: 0
-
-      - name: Sync VM submodule
-        run: |
-          git submodule sync
-          git submodule update --init
+          submodules: 'true'
 
       - name: Set up Go
         uses: actions/setup-go@v4
@@ -144,6 +140,7 @@ jobs:
       - uses: actions/checkout@v3
         with:
           fetch-depth: 0
+          submodules: 'true'
 
       - name: Set up Go
         uses: actions/setup-go@v4
@@ -154,10 +151,5 @@ jobs:
       - name: Update Go modules
         run: go mod download -json
 
-      - name: Sync VM submodule
-        run: |
-          git submodule sync
-          git submodule update --init
-
       - name: Run tests
         run: go test -v -race ./...