Update to right image

Author: Rohan-Bierneni

.github/workflows/UnitTests.yml

@@ -30,7 +30,7 @@ jobs:
     # IMPORTANT: Replace with the label for your runner (e.g., v5p-8)
     runs-on: ["linux-x86-a3-megagpu-h100-8gpu"]
     container:
-      image: gcr.io/tpu-prod-env-multipod/maxdiffusion_stable_stack_candidate:latest
+      image: gcr.io/tpu-prod-env-multipod/maxdiffusion_stable_stack_candidate:jax0.7.2_rev1_gpu
     steps:
       - name: Checkout Repository
         uses: actions/checkout@v4