ci: exclude angular packages from all-minor-patch

With this change we restore the behaviour that Angular packages are updated via a separate PR.

Author: alan-agius4

renovate.json

@@ -65,6 +65,7 @@
         "!packages/angular_devkit/schematics_cli/schematic/files/package.json",
         "!packages/schematics/angular/utility/latest-versions/package.json"
       ],
+      "excludePackagePatterns": ["^@angular/.*"],
       "matchPackagePatterns": ["*"],
       "matchUpdateTypes": ["minor", "patch"],
       "groupName": "all non-major dependencies",