fix: Run AstroUpdate before Lazy sync (#473)

src/steps/upgrade.vim

@@ -1,3 +1,14 @@
+" AstroUpdate calls a plugin manager - Lazy as of this writing. So we check for it before
+" others. Add to init.lua:
+" updater = {
+"   skip_prompts = true,
+" },
+if exists(":AstroUpdate")
+   echo "AstroUpdate"
+   AstroUpdate
+   quitall
+endif
+
 if exists(":NeoBundleUpdate")
     echo "NeoBundle"
     NeoBundleUpdate
@@ -38,11 +49,6 @@ if exists(":Lazy")
     Lazy! sync | qa
 endif
 
-if exists(":AstroUpdate")
-   echo "AstroUpdate"
-   AstroUpdate
-endif
-
 if exists(':PackerSync')
     echo "Packer"
     autocmd User PackerComplete quitall