Update nginx Docker tag to v1.31 (#629)

* Update nginx Docker tag to v1.31

Signed-off-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>

* Add changelog entry for nginx v1.31 update PR

Agent-Logs-Url: https://github.com/cortexproject/cortex-helm-chart/sessions/30fb5ed8-6e9a-4cb3-9389-a3e57639e552

Co-authored-by: kd7lxl <194108+kd7lxl@users.noreply.github.com>

---------

Signed-off-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>
Co-authored-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>
Co-authored-by: copilot-swe-agent[bot] <198982749+Copilot@users.noreply.github.com>
Co-authored-by: kd7lxl <194108+kd7lxl@users.noreply.github.com>

Author: 3 people

CHANGELOG.md

@@ -2,6 +2,7 @@
 
 ## master / unreleased
 
+* [DEPENDENCY] update nginx docker tag to v1.31 #629
 * [DEPENDENCY] update memcached docker tag to v1.6.42 #631
 
 ## 3.3.0 / 2026-04-27

README.md

@@ -494,7 +494,7 @@ Kubernetes: `^1.19.0-0`
 | nginx.​http_listen_port | int | `80` |  |
 | nginx.​image.​pullPolicy | string | `"IfNotPresent"` |  |
 | nginx.​image.​repository | string | `"nginx"` |  |
-| nginx.​image.​tag | float | `1.29` |  |
+| nginx.​image.​tag | float | `1.31` |  |
 | nginx.​initContainers | list | `[]` |  |
 | nginx.​livenessProbe.​httpGet.​path | string | `"/healthz"` |  |
 | nginx.​livenessProbe.​httpGet.​port | string | `"http-metrics"` |  |

values.yaml

@@ -1359,7 +1359,7 @@ nginx:
     override_push_endpoint: ""
   image:
     repository: nginx
-    tag: 1.29
+    tag: 1.31
     pullPolicy: IfNotPresent
 
   service: