Update main_ci.yml

Author: mosfet80

.github/workflows/main_ci.yml

@@ -33,7 +33,7 @@ jobs:
       options: --user root
 
     steps:
-    - uses: actions/checkout@v2
+    - uses: actions/checkout@v4
     - name: Create Build Environment
       run: cmake -E make_directory build
     - name: Configure
@@ -59,7 +59,7 @@ jobs:
     runs-on: macos-11
 
     steps:
-    - uses: actions/checkout@v2
+    - uses: actions/checkout@v4
     - uses: maxim-lobanov/setup-xcode@v1
       with:
         xcode-version: ${{matrix.xcode}}
@@ -86,7 +86,7 @@ jobs:
     runs-on: windows-2022
 
     steps:
-    - uses: actions/checkout@v2
+    - uses: actions/checkout@v4
     - name: Create Build Environment
       run: cmake -E make_directory build
     - name: Configure