Move to version 4 of github checkout action

.github/workflows/ci.yml

@@ -111,7 +111,7 @@ jobs:
           #  }
 
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
         with:
           submodules: 'true'
 

.github/workflows/clang-doc.yml

@@ -12,7 +12,7 @@ jobs:
     runs-on: ubuntu-latest
 
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
         with:
           submodules: 'true'
 

.github/workflows/hdoc.yml

@@ -14,7 +14,7 @@ jobs:
       installed_clang_version: 14
 
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
         with:
           submodules: 'true'
 

.github/workflows/subdoc.yml

@@ -15,7 +15,7 @@ jobs:
       source_url: "https://github.com/chromium/subspace/blob/main"
 
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
         with:
           submodules: 'true'
 

.github/workflows/try.yml

@@ -112,7 +112,7 @@ jobs:
         #  }
 
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
         with:
           submodules: 'true'
 
@@ -281,7 +281,7 @@ jobs:
       source_url: "https://github.com/chromium/subspace/blob/main"
 
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
         with:
           submodules: 'true'
 
@@ -440,7 +440,7 @@ jobs:
       installed_clang_version: 14
 
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
         with:
           submodules: 'true'