extension/src/goTelemetry: increase prompt rate to 25%

Fixes #3519

Change-Id: Id542c6439fda16d7afc7400d621c9e1c24f18444
Reviewed-on: https://go-review.googlesource.com/c/vscode-go/+/610717
kokoro-CI: kokoro <[email protected]>
Commit-Queue: Hyang-Ah Hana Kim <[email protected]>
Reviewed-by: Robert Findley <[email protected]>

Author: hyangah

extension/src/goTelemetry.ts

@@ -181,7 +181,7 @@ export class TelemetryService {
 	async promptForTelemetry(
 		isPreviewExtension: boolean,
 		isVSCodeTelemetryEnabled: boolean = vscode.env.isTelemetryEnabled,
-		samplingInterval = 50 /* prompt N out of 1000. 50 = 5% */
+		samplingInterval = 250 /* prompt N out of 1000. 250 = 25% */
 	) {
 		if (!this.active) return;