GHA: Add permissions and update Actions

Author: back-2-95

.github/workflows/tests.yml

@@ -2,6 +2,9 @@ name: Tests
 
 on: [push]
 
+permissions:
+  contents: read
+
 jobs:
 
   test:
@@ -16,11 +19,11 @@ jobs:
     steps:
 
       - name: Checkout code
-        uses: actions/checkout@v3
+        uses: actions/checkout@v6
         with:
           fetch-depth: 1
 
-      - uses: actions/setup-node@v3
+      - uses: actions/setup-node@v6
         with:
           node-version: 20