Bump v21.0.0-alpha.1

ELECTRON_VERSION

@@ -1 +1 @@
-21.0.0-nightly.20220803
+21.0.0-alpha.1

package.json

@@ -1,6 +1,6 @@
 {
   "name": "electron",
-  "version": "21.0.0-nightly.20220803",
+  "version": "21.0.0-alpha.1",
   "repository": "https://github.com/electron/electron",
   "description": "Build cross platform desktop apps with JavaScript, HTML, and CSS",
   "devDependencies": {

shell/browser/resources/win/electron.rc

@@ -50,8 +50,8 @@ END
 //
 
 VS_VERSION_INFO VERSIONINFO
- FILEVERSION 21,0,0,20220803
+ FILEVERSION 21,0,0,1
- PRODUCTVERSION 21,0,0,20220803
+ PRODUCTVERSION 21,0,0,1
  FILEFLAGSMASK 0x3fL
 #ifdef _DEBUG
  FILEFLAGS 0x1L