Merge branch 'update-thanos-tag-15.9.1-bb.0' into 'master'

thanos update to 15.9.1-bb.0

Closes big-bang/product/packages/thanos#89

See merge request !5610

chart/values.yaml

@@ -2048,12 +2048,12 @@ addons:
 
     git:
       repo: https://repo1.dso.mil/big-bang/product/packages/thanos.git
-      tag: "15.8.1-bb.0"
+      tag: "15.9.1-bb.0"
       path: "./chart"
     helmRepo:
       repoName: "registry1"
       chartName: "thanos"
-      tag: "15.8.1-bb.0"
+      tag: "15.9.1-bb.0"
 
     # -- Flux reconciliation overrides specifically for the Thanos Package
     flux: {}