gopls/doc/features: fix prominent typo

Change-Id: I083263af30c4496349864979aec32631cf6474bd
Reviewed-on: https://go-review.googlesource.com/c/tools/+/603115
Auto-Submit: Alan Donovan <[email protected]>
LUCI-TryBot-Result: Go LUCI <[email protected]>
Reviewed-by: Robert Findley <[email protected]>

Author: adonovan

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