fix(ci): update trunk go runtime to match go.mod version (#9575)

## Summary

- Updates trunk's Go runtime from `1.24.3` to `1.25.6` to match the
`go.mod` version

## Context

Commit 5bc2925 updated `go.mod` to Go 1.25.6, but the trunk runtime
configuration was not updated. This causes the Trunk Code Quality CI
check to fail with:

```
Error: can't load config: the Go language version (go1.24) used to build golangci-lint is lower than the targeted Go version (1.25.6)
```

## Test plan

- [x] Verified `trunk check` passes locally after the change

Author: mlwelles

.trunk/trunk.yaml

@@ -14,7 +14,7 @@ plugins:
 # Many linters and tools depend on runtimes - configure them here. (https://docs.trunk.io/runtimes)
 runtimes:
   enabled:
-    - go@1.24.3
+    - go@1.25.6
     - [email protected]
     - [email protected]