fix: upload with token only for main repository

Author: vil02

.github/workflows/build.yml

@@ -25,7 +25,9 @@ jobs:
           files: "${{ env.COVERAGE_REPORT_PATH }}"
           fail_ci_if_error: true
       - name: Upload coverage to codecov (with token)
-        if: "! github.event.pull_request.head.repo.fork "
+        if: >
+          github.repository == 'TheAlgorithms/Java' &&
+          "! github.event.pull_request.head.repo.fork "
         uses: codecov/codecov-action@v4
         with:
           token: ${{ secrets.CODECOV_TOKEN }}