Update actions that use Node.js 20 to versions that use Node.js 24

Author: AntonioND

.github/workflows/build.yml

@@ -30,7 +30,7 @@ jobs:
 
     steps:
       - name: Clone project
-        uses: actions/checkout@v4
+        uses: actions/checkout@v6
         with:
           repository: 'blocksds/sdk'
           ref: 'master'
@@ -61,7 +61,7 @@ jobs:
           tar -cvf ../../repo.tar ./*
 
       - name: Upload repo artifact
-        uses: actions/upload-artifact@v4
+        uses: actions/upload-artifact@v6
         with:
           name: github-pages
           path: repo.tar