MINOR Fix condition in flaky test report workflow (#18599)

Reviewers: Mickael Maison <mickael.maison@gmail.com>

.github/workflows/generate-reports.yml

@@ -23,7 +23,6 @@ on:
 jobs:
   flaky-test-report:
     name: Flaky Test Report
-    if : github.event.repository.fork == 'false'
     permissions:
       contents: read
     runs-on: ubuntu-latest
@@ -37,6 +36,7 @@ jobs:
       - name: Setup Python
         uses: ./.github/actions/setup-python
       - name: Run Report
+        if : ${{ ! github.event.repository.fork }}
         env:
           DEVELOCITY_ACCESS_TOKEN: ${{ secrets.DV_API_ACCESS }}
         run: |