ci: disable golangci-lint config schema verification (#770)

golangci-lint-action v9 defaults to `verify: true`, which runs
`golangci-lint config verify`. That step downloads the config JSON
schema from golangci-lint.run at runtime and fails the job on network
timeouts (context deadline exceeded), unrelated to any lint findings.

Set `verify: false` so linting no longer depends on external network
availability.

Signed-off-by: Radoslav Dimitrov <radoslav@stacklok.com>
Co-authored-by: Claude Opus 4.8 <noreply@anthropic.com>

Author: rdimitrov

.github/workflows/linting.yml

@@ -49,3 +49,6 @@ jobs:
           # When `install-mode` is `goinstall` the value can be v1.2.3, `latest`, or the hash of a commit.
           version: v2.11.4
           args: --timeout 5m --verbose
+          # Skip config schema verification: it fetches the JSON schema from
+          # golangci-lint.run at runtime and flakes on network timeouts.
+          verify: false