Pin releasever to RL9.4

Author: bertiethorpe

.github/workflows/nightlybuild.yml

@@ -41,6 +41,14 @@ jobs:
     steps:
       - uses: actions/checkout@v2
 
+      - name: Pin releasever to RL9.4
+        if: matrix.os_version == 'RL9'
+        run: |
+          echo "[main]" | sudo tee /etc/dnf/dnf.conf
+          echo "releasever=9.4" | sudo tee -a /etc/dnf/dnf.conf
+          echo "Pinned releasever to 9.4 for Rocky Linux 9 builds"
+        shell: bash
+
       - name: Record settings for CI cloud
         run: |
           echo CI_CLOUD: ${{ env.CI_CLOUD }}