gopls/doc/features: fix prominent typo

Change-Id: I083263af30c4496349864979aec32631cf6474bd
Reviewed-on: https://go-review.googlesource.com/c/tools/+/603115
Auto-Submit: Alan Donovan <adonovan@google.com>
LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com>
Reviewed-by: Robert Findley <rfindley@google.com>

gopls/doc/features/web.md

@@ -108,7 +108,7 @@ Client support:
 
 
 <a name='assembly'></a>
-## Browsse assembly
+## Browse assembly
 
 When you're optimizing the performance of your code or investigating
 an unexpected crash, it may sometimes be helpful to inspect the