CHANGELOG.md: update for v0.39.1

And fix the go developer survey prompt. It's too hot to be summer.

For #2870

Change-Id: Icde5d150f76c8def04e28eddea57ee2be74a9a84
Reviewed-on: https://go-review.googlesource.com/c/vscode-go/+/509935
Run-TryBot: Hyang-Ah Hana Kim <hyangah@gmail.com>
TryBot-Result: kokoro <noreply+kokoro@google.com>
Reviewed-by: Todd Kulesza <tkulesza@google.com>

CHANGELOG.md

@@ -1,3 +1,8 @@
+## v0.39.1 - 17 Jul, 2023
+
+This is a point release to update the link for the upcoming Go developer survey.
+A list of changes can be found in the full [commit history](https://github.com/golang/vscode-go/compare/v0.39.1...v0.39.0).
+
 ## v0.39.0 - 12 Jun, 2023
 
 We are in the process of removing legacy language features that were replaced by `gopls` since early 2021. The versions released after September 2023 will no longer offer features like code completion, navigation, documentation, formatting, and refactoring if the language server is disabled. In this release, we are showing deprecation notification messages if you are using the legacy language features. ([Issue 2799](https://github.com/golang/vscode-go/issues/2799))

src/goDeveloperSurvey.ts

@@ -124,7 +124,7 @@ export function shouldPromptForSurvey(now: Date, cfg: DeveloperSurveyConfig): De
 export async function promptForDeveloperSurvey(cfg: DeveloperSurveyConfig, now: Date): Promise<DeveloperSurveyConfig> {
 	const selected = await vscode.window.showInformationMessage(
 		`"Help shape Go’s future! Would you like to help ensure that Go is meeting your needs
-by participating in this 10-minute Go Developer Survey (2023 Winter) before ${endDate.toDateString()}?`,
+by participating in this 10-minute Go Developer Survey (2023 H2) before ${endDate.toDateString()}?`,
 		'Yes',
 		'Remind me later',
 		'Never'