fix(helm): drop main- prefix from default image tag (#28710)

* fix(helm): drop main- prefix from default image tag

The default image tag in the deployment + migrations-job templates was
`main-{{ .Chart.AppVersion }}`. The current release pipeline publishes
content tags without the `main-` prefix (e.g. `v1.85.1` / `1.85.1`,
`v1.86.0-rc.1` / `1.86.0-rc.1`), so the rendered ref points at a tag
that does not exist on GHCR or DockerHub and installs fail with
ImagePullBackOff.

- templates/deployment.yaml, templates/migrations-job.yaml: render
  `.Chart.AppVersion` directly instead of `main-<AppVersion>`.
- Chart.yaml: bump stale `appVersion: v1.80.12` (not on either
  registry) to `v1.85.1` so local-checkout installs also resolve.
- values.yaml: update the commented tag-override hint to match.

* fix(helm): use :latest in tag override example, not pinned version

Per review: ghcr.io/berriai/litellm-database:latest is a floating
alias for the most recent stable (same digest as :main-stable),
maintained by the release pipeline's UPDATE_LATEST advance step.
Better example than a pinned version that goes stale.

deploy/charts/litellm-helm/Chart.yaml

@@ -24,7 +24,7 @@ version: 1.1.0
 # incremented each time you make changes to the application. Versions are not expected to
 # follow Semantic Versioning. They should reflect the version the application is using.
 # It is recommended to use it with quotes.
-appVersion: v1.80.12
+appVersion: v1.85.1
 
 annotations:
   org.opencontainers.image.source: "https://github.com/BerriAI/litellm"

deploy/charts/litellm-helm/templates/deployment.yaml

@@ -53,7 +53,7 @@ spec:
         - name: {{ include "litellm.name" . }}
           securityContext:
             {{- toYaml .Values.securityContext | nindent 12 }}
-          image: "{{ .Values.image.repository }}:{{ .Values.image.tag | default (printf "main-%s" .Chart.AppVersion) }}"
+          image: "{{ .Values.image.repository }}:{{ .Values.image.tag | default .Chart.AppVersion }}"
           imagePullPolicy: {{ .Values.image.pullPolicy }}
           env:
             - name: HOST

deploy/charts/litellm-helm/templates/migrations-job.yaml

@@ -41,7 +41,7 @@ spec:
       {{- end }} 
       containers:
         - name: prisma-migrations
-          image: "{{ .Values.image.repository }}:{{ .Values.image.tag | default (printf "main-%s" .Chart.AppVersion) }}"
+          image: "{{ .Values.image.repository }}:{{ .Values.image.tag | default .Chart.AppVersion }}"
           imagePullPolicy: {{ .Values.image.pullPolicy }}
           securityContext:
             {{- toYaml .Values.securityContext | nindent 12 }}

deploy/charts/litellm-helm/values.yaml

@@ -10,7 +10,7 @@ image:
   repository: ghcr.io/berriai/litellm-database
   pullPolicy: Always
   # Overrides the image tag whose default is the chart appVersion.
-  # tag: "main-latest"
+  # tag: "latest"
   tag: ""
 
 imagePullSecrets: []