bump nginx ingress chart to fix 2025 CVEs

Change-Id: I83eb8cc3088e53c083249256a93b7b66744ebe00
(cherry picked from commit 806de7313f98d6e733d222cd779608e8c3ec82be)
(cherry picked from commit 8d29532d05dd95fc75c99e3910883a11d4852a8b)
diff --git a/.charts.yml b/.charts.yml
index 0676df4..c93b462 100644
--- a/.charts.yml
+++ b/.charts.yml
@@ -82,7 +82,7 @@
         review.opendev.org:
           - 919480
   - name: ingress-nginx
-    version: 4.0.17
+    version: 4.12.1
     repository:
       url: https://kubernetes.github.io/ingress-nginx
   - name: ironic