update issue instead of creating a new one

.github/workflows/nightly-tests.yml

@@ -27,9 +27,20 @@ jobs:
       - name: Report Failure
         if: ${{ failure() }}
         run: |
-          gh --repo ${{ github.repository }} issue create  \
-              --title "Rolling Build Failure $(date +'%Y-%m-%d')" \
-              --body "cc @microsoft/aifx-compilers 
-                      The rolling build has failed. See: ${{ github.server_url }}/${{ github.repository }}/actions/runs/${{ github.run_id }}"
+          issues=$(gh --repo microsoft/triton-shared issue list --label nightly-build-failure --state open)
+          build_url="${{ github.server_url }}/${{ github.repository }}/actions/runs/${{ github.run_id }}"
+          notificiation_list="@microsoft/aifx-compilers"
+          if [ -z "$issues" ]; then
+            gh --repo ${{ github.repository }} issue create  \
+                --title "Nightly Build Failure $(date +'%Y-%m-%d')" \
+                --label "nightly-build-failure" \
+                --body "cc $notificiation_list
+                        The nightly build has failed. See: $build_url"
+          else
+            issue_number=$(echo "$issues" | head -n 1 | awk '{print $1}')
+            gh --repo microsoft/triton-shared issue comment $issue_number \
+                --body "cc $notificiation_list
+                        The nightly build has failed again. See: $build_url"
+          fi
         env:
           GH_TOKEN: ${{ github.token }}