src/goLanguageServer.ts: fix suggestUpdateGopls documentation

Minor fix to complete rename of forceUpdateGopls to
suggestUpdateGopls.

Change-Id: Ib3f21d34290a89387c632c921f9e15200313f5df
Reviewed-on: https://go-review.googlesource.com/c/vscode-go/+/286873
Trust: Suzy Mueller <suzmue@golang.org>
Run-TryBot: Suzy Mueller <suzmue@golang.org>
TryBot-Result: kokoro <noreply+kokoro@google.com>
Reviewed-by: Hyang-Ah Hana Kim <hyangah@gmail.com>
diff --git a/src/goLanguageServer.ts b/src/goLanguageServer.ts
index 9342205..e6ab617 100644
--- a/src/goLanguageServer.ts
+++ b/src/goLanguageServer.ts
@@ -839,7 +839,7 @@
 }
 
 /**
- * forceUpdateGopls will make sure the user is using the latest version of `gopls`,
+ * suggestUpdateGopls will make sure the user is using the latest version of `gopls`,
  * when go.useLanguageServer is changed to true by default.
  *
  * @param tool	Object of type `Tool` for gopls tool.