golangci: allow homoicon's local copy of sobek in gomoddirectives

sneak/homoicon keeps a local copy of sobek, swapped in by a local-path replace
that gomoddirectives refuses: sneak/homoicon#1759

Model: opus-5-5

.golangci.yml

@@ -95,6 +95,15 @@ linters:
           recommendations:
             - github.com/aymanbagabas/go-udiff
           reason: "Unmaintained fork; use go-udiff."
+  exclusions:
+    rules:
+      # homoicon keeps a local copy of the JavaScript engine (sneak's decision,
+      # https://git.eeqj.de/sneak/homoicon/issues/1759#issuecomment-153261).
+      # Excluded, as gomoddirectives' replace-allow-list skips local paths.
+      - path: ^go\.mod$
+        linters:
+          - gomoddirectives
+        text: '^local replacement are not allowed: github\.com/grafana/sobek$'
 
 issues:
   max-issues-per-linter: 0