extension/src/goTelemetry: increase telemetry prompt rate to 100%

Change-Id: I89332c9201c24ec7afbf1af8386c0026ba9e9ea4
Reviewed-on: https://go-review.googlesource.com/c/vscode-go/+/625495
Reviewed-by: Hongxiang Jiang <hxjiang@golang.org>
Commit-Queue: Hyang-Ah Hana Kim <hyangah@gmail.com>
kokoro-CI: kokoro <noreply+kokoro@google.com>
Reviewed-by: Robert Findley <rfindley@google.com>

Author: hyangah

extension/src/goTelemetry.ts

@@ -181,7 +181,7 @@ export class TelemetryService {
 	async promptForTelemetry(
 		isPreviewExtension: boolean,
 		isVSCodeTelemetryEnabled: boolean = vscode.env.isTelemetryEnabled,
-		samplingInterval = 250 /* prompt N out of 1000. 250 = 25% */
+		samplingInterval = 1000 /* prompt N out of 1000. 1000 = 100% */
 	) {
 		if (!this.active) return;