fix: add missing rhel builds for ngc images

Follow-up of #297: looks like I've missed adding the new RHEL9 driver
builds for images pushed to NGC. This MR adds the missing builds. I've
followed the same pattern as for RHEL8, so new builds are added for each
of the minor releases of RHEL9 (9.0, 9.1, 9.2, 9.3).

.nvidia-ci.yml

@@ -409,3 +409,31 @@ release:ngc-rhel8.9:
     - .dist-rhel8
   variables:
     OUT_DIST: "rhel8.9"
+
+release:ngc-rhel9.0:
+  extends:
+    - .release:ngc
+    - .dist-rhel9
+  variables:
+    OUT_DIST: "rhel9.0"
+
+release:ngc-rhel9.1:
+  extends:
+    - .release:ngc
+    - .dist-rhel9
+  variables:
+    OUT_DIST: "rhel9.1"
+
+release:ngc-rhel9.2:
+  extends:
+    - .release:ngc
+    - .dist-rhel9
+  variables:
+    OUT_DIST: "rhel9.2"
+
+release:ngc-rhel9.3:
+  extends:
+    - .release:ngc
+    - .dist-rhel9
+  variables:
+    OUT_DIST: "rhel9.3"