extension: update gopls v0.20.0 settings

This is an automated CL which updates the gopls version and settings.

For golang/go#74655

Change-Id: Ia680c5d07c698c8ae539b1aa9923d390ae1d3736
Reviewed-on: https://go-review.googlesource.com/c/vscode-go/+/691035
Auto-Submit: Gopher Robot <[email protected]>
kokoro-CI: kokoro <[email protected]>
Reviewed-by: Alan Donovan <[email protected]>
Reviewed-by: Hongxiang Jiang <[email protected]>
LUCI-TryBot-Result: Go LUCI <[email protected]>

Author: gopherbot

extension/src/goToolsInformation.ts

@@ -111,8 +111,8 @@ export const allToolsInformation: { [key: string]: Tool } = {
 		description: 'Language Server from Google',
 		usePrereleaseInPreviewMode: true,
 		minimumGoVersion: semver.coerce('1.19'),
-		latestVersion: semver.parse('v0.19.1'),
-		latestVersionTimestamp: moment('2025-06-18', 'YYYY-MM-DD')
+		latestVersion: semver.parse('v0.20.0'),
+		latestVersionTimestamp: moment('2025-07-28', 'YYYY-MM-DD')
 	},
 	'dlv': {
 		name: 'dlv',