update coder to 2.15.1, set upload limit

- set ingress proxy body size to 10GB
- update coder to 2.15.1

helm/ti-coder/Chart.lock

@@ -4,6 +4,6 @@ dependencies:
   version: 15.5.38
 - name: coder
   repository: https://helm.coder.com/v2
-  version: 2.14.3
-digest: sha256:521af3a0102a7bb7589ae671a0bc3a3a9b595034bf836a3db23d317428b7e339
-generated: "2024-10-04T11:28:06.225976841+02:00"
+  version: 2.15.1
+digest: sha256:bc8f011e97a028bbd69d8d7d9ba94a00ed67d7b72c1c61ebdefac363b8772861
+generated: "2024-10-04T12:03:51.146914593+02:00"