internal/lsp/cmd: change pre-filled issue header for gopls bug

Change-Id: I221f2e6a0dc41cfd8325df64607b5c625d69ca17
Reviewed-on: https://go-review.googlesource.com/c/tools/+/240503
Run-TryBot: Rebecca Stambler <rstambler@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Hyang-Ah Hana Kim <hyangah@gmail.com>
(cherry picked from commit 9a0e069)
Reviewed-on: https://go-review.googlesource.com/c/tools/+/240504

internal/lsp/cmd/info.go

@@ -47,8 +47,8 @@ func (b *bug) DetailedHelp(f *flag.FlagSet) {
 	f.PrintDefaults()
 }
 
-const goplsBugPrefix = "x/tools/gopls: "
-const goplsBugHeader = `Please answer these questions before submitting your issue. Thanks!
+const goplsBugPrefix = "x/tools/gopls: <DESCRIBE THE PROBLEM>"
+const goplsBugHeader = `ATTENTION: Please answer these questions BEFORE submitting your issue. Thanks!
 
 #### What did you do?
 If possible, provide a recipe for reproducing the error.