[release-v0.52]extension/package.json: update version to 0.52.1

This is an automated CL which updates the package.json and package-lock.json.

Change-Id: Ibe92eda3603f600796c574affd8b4435bc20ae9c
Reviewed-on: https://go-review.googlesource.com/c/vscode-go/+/731120
Reviewed-by: Peter Weinberger <[email protected]>
Auto-Submit: Gopher Robot <[email protected]>
LUCI-TryBot-Result: Go LUCI <[email protected]>
Reviewed-by: Madeline Kalil <[email protected]>

Author: gopherbot

extension/package-lock.json

@@ -1,7 +1,7 @@
 {
   "name": "go",
   "displayName": "Go",
-  "version": "0.52.0",
+  "version": "0.52.1",
   "publisher": "golang",
   "description": "Rich Go language support for Visual Studio Code",
   "author": {