fix: remove non-existent 2025 cumulative update URL

The CU download page for SQL Server 2025 does not exist yet (returns 404),
causing a warning during installation. Remove it until Microsoft publishes
cumulative updates.

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

Author: dhensby

lib/main/index.js

@@ -21,7 +21,7 @@ export const VERSIONS = new Map<string, VersionConfig>(
         ['2025', {
             version: '2025',
             sseiUrl: 'https://download.microsoft.com/download/77dc60d3-0139-4dad-83c8-bb52ab22db01/SQL2025-SSEI-StdDev.exe',
-            updateUrl: 'https://www.microsoft.com/en-us/download/details.aspx?id=106520',
+            // updateUrl can be added once Microsoft publishes cumulative updates for 2025
         }],
         ['2022', {
             version: '2022',