fix(ci): update checkout action to v4 and enable recursive submodules

Author: Icemic

.github/workflows/main.yml

@@ -23,7 +23,9 @@ jobs:
     runs-on: ${{ matrix.os }}
 
     steps:
-    - uses: actions/checkout@v1
+    - uses: actions/checkout@v4
+      with:
+        submodules: recursive
 
     - name: Install stable toolchain
       uses: actions-rs/toolchain@v1