Revert "fix: bump chart" (#578)

This reverts commit d8af92f.

The objective of this PR is to
- revert the commit that caused the merge conflict that is preventing the ssi-hub v2.12 release to prod PR from being merged: #576
- revert helm to version that matches the current prod values.yaml

devops/prod/Chart.yaml

@@ -13,5 +13,5 @@ appVersion: "1.0"
 
 dependencies:
   - name: iam-cache-server-helm
-    version: 1.2.1
+    version: 1.1.2
     repository: "oci://984870885661.dkr.ecr.us-west-2.amazonaws.com"