Fix JSX type reference inconsistency in DialogApiDialog

The `update` method used `React.JSX.Element` for the first union member
and plain `JSX.Element` for the second. These resolve to the same type
but the inconsistency within a single method signature is confusing.
Aligned both to use `JSX.Element` to match the rest of the file.

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

.changeset/fix-dialog-api-jsx-type.md

@@ -0,0 +1,5 @@
+---
+'@backstage/frontend-plugin-api': patch
+---
+
+Fixed inconsistent `JSX.Element` type reference in the `DialogApiDialog.update` method signature.

packages/frontend-plugin-api/report.api.md

@@ -866,7 +866,7 @@ export interface DialogApiDialog<TResult = void> {
   result(): Promise<TResult>;
   update(
     elementOrComponent:
-      | React.JSX.Element
+      | JSX.Element
       | ((props: { dialog: DialogApiDialog<TResult> }) => JSX.Element),
   ): void;
 }

packages/frontend-plugin-api/src/apis/definitions/DialogApi.ts

@@ -42,7 +42,7 @@ export interface DialogApiDialog<TResult = void> {
    */
   update(
     elementOrComponent:
-      | React.JSX.Element
+      | JSX.Element
       | ((props: { dialog: DialogApiDialog<TResult> }) => JSX.Element),
   ): void;