misc/ upgrade actions/checkout to v6

Author: maximegris

.github/workflows/macos.yml

@@ -28,7 +28,7 @@ jobs:
     runs-on: macos-12
 
     steps:
-    - uses: actions/checkout@v3
+    - uses: actions/checkout@v6
 
     - name: Cache node modules
       uses: actions/cache@v4

.github/workflows/ubuntu.yml

@@ -25,7 +25,7 @@ jobs:
     runs-on: ubuntu-22.04
 
     steps:
-    - uses: actions/checkout@v3
+    - uses: actions/checkout@v6
 
     - name: Cache node modules
       uses: actions/cache@v4

.github/workflows/windows.yml

@@ -28,7 +28,7 @@ jobs:
     runs-on: windows-2022
 
     steps:
-    - uses: actions/checkout@v3
+    - uses: actions/checkout@v6
 
     - name: Cache node modules
       uses: actions/cache@v4