chore: remove isomorphic-form-data from dependencies

The need to explicitly specify this dependency was resolved.

Issue: https://github.com/swagger-api/swagger-ui/issues/7436
Resolution: https://github.com/swagger-api/swagger-ui/issues/7436#issuecomment-889792304
Signed-off-by: Tim Klever <tim.v.klever@aexp.com>

.changeset/short-aliens-invite.md

@@ -0,0 +1,13 @@
+---
+'@backstage/plugin-api-docs': minor
+---
+
+Remove explicit dependency on `isomorphic-form-data`.
+
+This explicit dependency was added to address [an issue](https://github.com/swagger-api/swagger-ui/issues/7436) in the
+dependency `swagger-ui-react`. That [issue has since been resolved](https://github.com/swagger-api/swagger-ui/issues/7436#issuecomment-889792304),
+and `isomorphic-form-data` no longer needs to be declared.
+
+Additionally, this changeset updates the `swagger-ui-react` dependency to version `5.19.0` or higher, which includes
+[compatibility](https://github.com/swagger-api/swagger-ui?tab=readme-ov-file#compatibility) with the latest versions of
+the OpenAPI specification.

plugins/api-docs/package.json

@@ -71,8 +71,7 @@
     "graphql": "^16.0.0",
     "graphql-config": "^5.0.2",
     "graphql-ws": "^5.4.1",
-    "isomorphic-form-data": "^2.0.0",
-    "swagger-ui-react": "^5.0.0"
+    "swagger-ui-react": "^5.27.1"
   },
   "devDependencies": {
     "@backstage/cli": "workspace:^",