Limit @remixicon/react to versions below 4.9.0

The license changed in 4.9.0, so we need to cap the allowed version
range across all packages that depend on it.

Signed-off-by: Patrik Oldsberg <poldsberg@gmail.com>
Made-with: Cursor

.changeset/limit-remix-icon-version.md

@@ -0,0 +1,17 @@
+---
+'@backstage/ui': patch
+'@backstage/plugin-api-docs': patch
+'@backstage/plugin-app': patch
+'@backstage/plugin-app-visualizer': patch
+'@backstage/plugin-auth': patch
+'@backstage/plugin-catalog-graph': patch
+'@backstage/plugin-catalog-import': patch
+'@backstage/plugin-catalog-react': patch
+'@backstage/plugin-notifications': patch
+'@backstage/plugin-org': patch
+'@backstage/plugin-scaffolder': patch
+'@backstage/plugin-signals': patch
+'@backstage/plugin-techdocs': patch
+---
+
+Limited `@remixicon/react` dependency to versions below 4.9.0 due to a license change in that release.