Merge pull request #57 from MahamoudTBS/patch-1

Update build-jeckyll.yml - up dated checkout action to v3

.github/workflows/build-jeckyll.yml

@@ -16,7 +16,7 @@ jobs:
           - 8080:8080
 
     steps:
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@v3
 
       # Use GitHub Actions' cache to cache dependencies on servers
       - uses: actions/cache@v2