chore: Updated [prod] values.yaml image tags to sha-26cab06

Author: czi-github-helper[bot]

.infra/prod/values.yaml

@@ -2,7 +2,7 @@ stack:
   services:
     backend:
       image:
-        tag: sha-1c09a4a
+        tag: sha-26cab06
       replicaCount: 1
       ingress:
         rules: