Update GitHub Actions to use latest github-script version

Upgraded to `actions/github-script@v7.0.1` and updated the method call to `github.rest.issues.createComment` for compatibility with the newer version. This ensures better performance and alignment with the latest API changes.

Author: HichemTab-tech

.github/workflows/pr-welcome.yml

@@ -25,11 +25,11 @@ jobs:
 
       - name: Comment on PR (if not the maintainer)
         #if: env.AUTHOR != 'HichemTab-tech'
-        uses: actions/github-script@v6
+        uses: actions/github-script@v7.0.1
         with:
           github-token: ${{secrets.GITHUB_TOKEN}}
           script: |
-            github.issues.createComment({
+            github.rest.issues.createComment({
               issue_number: context.issue.number,
               owner: context.repo.owner,
               repo: context.repo.repo,