claudetool: remove mention of go doc
diff --git a/claudetool/keyword.go b/claudetool/keyword.go
index f16338f..048a236 100644
--- a/claudetool/keyword.go
+++ b/claudetool/keyword.go
@@ -35,7 +35,7 @@
- Order search terms by importance (most important first)
- Supports regex search terms for flexible matching
-IMPORTANT: Do NOT use this tool if you have precise information like log lines, error messages, filenames, symbols, or package names. Use direct approaches (grep, cat, go doc, etc.) instead.
+IMPORTANT: Do NOT use this tool if you have precise information like log lines, error messages, stack traces, filenames, or symbols. Use direct approaches (rg, cat, etc.) instead.
`
// If you modify this, update the termui template for prettier rendering.