vscode: fix release tag retrieval

Co-Authored-By: Laurențiu Nicola <lnicola@users.noreply.github.com>

Author: Veetaha

editors/code/src/commands/server_version.ts

@@ -6,7 +6,7 @@ export function serverVersion(ctx: Ctx): Cmd {
     return async () => {
         const { stdout } = spawnSync(ctx.serverPath, ["--version"], { encoding: "utf8" });
         const commitHash = stdout.slice(`rust-analyzer `.length).trim();
-        const { releaseTag } = ctx.config;
+        const { releaseTag } = ctx.config.package;
 
         void vscode.window.showInformationMessage(
             `rust-analyzer version: ${releaseTag ?? "unreleased"} (${commitHash})`