build: Increase golangci-lint timeout for slower GHA runners

Without this, the reviewdog/action-golangci-lint action can give false
positives. See reviewdog/action-golangci-lint#27
for details.

This occurred in a GHA run in
https://github.com/d2iq-labs/capi-runtime-extensions/actions/runs/6451051901/job/17511173049?pr=192#step:5:88.

.golangci.yml

@@ -2,6 +2,7 @@
 # SPDX-License-Identifier: Apache-2.0
 
 run:
+  timeout: 10m
   skip-dirs:
     - pkg/external