use the newer checkout version

Author: HB9HIL

.github/workflows/electron.yml

@@ -9,7 +9,7 @@ jobs:
   build_on_linux:
     runs-on: ubuntu-latest
     steps:
-    - uses: actions/checkout@v2
+    - uses: actions/checkout@v4
     - uses: actions/setup-node@master
       with:
         node-version: 21
@@ -23,7 +23,7 @@ jobs:
   build_on_mac:
     runs-on: macos-14
     steps:
-    - uses: actions/checkout@v2
+    - uses: actions/checkout@v4
     - uses: actions/setup-node@master
       with:
         node-version: 21
@@ -46,7 +46,7 @@ jobs:
   build_on_win:
     runs-on: windows-latest
     steps:
-    - uses: actions/checkout@v2
+    - uses: actions/checkout@v4
     - uses: actions/setup-node@master
       with:
         node-version: 21