ci: Update to `actions/checkout@v4` from `v3`.

.github/workflows/cmake-wasm.yml

@@ -23,7 +23,7 @@ jobs:
     runs-on: ubuntu-latest
 
     steps:
-    - uses: actions/checkout@v3
+    - uses: actions/checkout@v4
 
     - name: Downloading wasi-sdk
       run: |
@@ -64,7 +64,7 @@ jobs:
         C_FLAGS: ['', '-msimd128', '-msse -msse2 -msimd128', '-msse -msse2 -msse3 -msse4 -msimd128']
     runs-on: ubuntu-latest
     steps:
-    - uses: actions/checkout@v3
+    - uses: actions/checkout@v4
     - name: Setup emsdk
       uses: mymindstorm/setup-emsdk@v12
 

.github/workflows/meson-wasm.yml

@@ -18,7 +18,7 @@ jobs:
         C_FLAGS: ['', '-msimd128', '-msse -msse2 -msimd128', '-msse -msse2 -msse3 -msse4 -msimd128']
     runs-on: ubuntu-latest
     steps:
-    - uses: actions/checkout@v3
+    - uses: actions/checkout@v4
     - name: Setup emsdk
       uses: mymindstorm/setup-emsdk@v13