Update config.json (#5964)

- add example-nextjs and example-reactrouter to changeset ignore too
(examples aren't part of releases)
- also remove the salty-experts-yawn.md changeset because it's no longer
relevant

this should fix broken github actions build currently on `main`

see
https://github.com/transloadit/uppy/pull/5942#issuecomment-3282585747

---------

Co-authored-by: Copilot <198982749+Copilot@users.noreply.github.com>
Co-authored-by: mifi <402547+mifi@users.noreply.github.com>

.changeset/config.json

@@ -28,6 +28,8 @@
     "example-xhr-bundle",
     "example-xhr-node",
     "example-xhr-php",
-    "example-xhr-python"
+    "example-xhr-python",
+    "example-reactrouter",
+    "example-nextjs"
   ]
 }

.changeset/salty-experts-yawn.md

@@ -1,7 +0,0 @@
----
-"example-reactrouter": major
-"example-nextjs": major
-"example-angular": major
----
-
-New example added for nextjs and react router and updated example for angular using latest CLI