chore: APISIX Ingress v1.6.0 release (#433)

diff --git a/charts/apisix-ingress-controller/Chart.yaml b/charts/apisix-ingress-controller/Chart.yaml
index a965ad4..453c7ae 100644
--- a/charts/apisix-ingress-controller/Chart.yaml
+++ b/charts/apisix-ingress-controller/Chart.yaml
@@ -24,8 +24,8 @@
   - nginx
   - crd
 type: application
-version: 0.11.2
-appVersion: 1.6.0-rc1
+version: 0.11.3
+appVersion: 1.6.0
 sources:
   - https://github.com/apache/apisix-helm-chart
 
@@ -34,4 +34,4 @@
 
 # ref: https://artifacthub.io/docs/topics/annotations/helm/
 annotations:
-  artifacthub.io/prerelease: "true"
+  artifacthub.io/prerelease: "false"
diff --git a/charts/apisix-ingress-controller/README.md b/charts/apisix-ingress-controller/README.md
index 82f1d20..4c872de 100644
--- a/charts/apisix-ingress-controller/README.md
+++ b/charts/apisix-ingress-controller/README.md
@@ -138,7 +138,7 @@
 | fullnameOverride | string | `""` |  |
 | image.pullPolicy | string | `"IfNotPresent"` |  |
 | image.repository | string | `"apache/apisix-ingress-controller"` |  |
-| image.tag | string | `"1.6.0-rc1"` |  |
+| image.tag | string | `"1.6.0"` |  |
 | imagePullSecrets | list | `[]` |  |
 | initContainer.image | string | `"busybox"` |  |
 | initContainer.tag | float | `1.28` |  |
diff --git a/charts/apisix-ingress-controller/values.yaml b/charts/apisix-ingress-controller/values.yaml
index b6df281..e10c94a 100644
--- a/charts/apisix-ingress-controller/values.yaml
+++ b/charts/apisix-ingress-controller/values.yaml
@@ -42,7 +42,7 @@
 image:
   repository: apache/apisix-ingress-controller
   pullPolicy: IfNotPresent
-  tag: "1.6.0-rc1"
+  tag: "1.6.0"
 
 podAnnotations: {}