refactor: rename extension error boundary fallback prop

Signed-off-by: Camila Belo <camilaibs@gmail.com>

packages/frontend-plugin-api/src/components/ErrorBoundary.tsx

@@ -20,7 +20,7 @@ import { CoreErrorBoundaryFallbackProps } from '../types';
 
 type ErrorBoundaryProps = PropsWithChildren<{
   plugin?: BackstagePlugin;
-  fallback: ComponentType<CoreErrorBoundaryFallbackProps>;
+  Fallback: ComponentType<CoreErrorBoundaryFallbackProps>;
 }>;
 type ErrorBoundaryState = { error?: Error };
 
@@ -41,7 +41,7 @@ export class ErrorBoundary extends Component<
 
   render() {
     const { error } = this.state;
-    const { plugin, children, fallback: Fallback } = this.props;
+    const { plugin, children, Fallback } = this.props;
 
     if (error) {
       return (

packages/frontend-plugin-api/src/components/ExtensionBoundary.tsx

@@ -70,7 +70,7 @@ export function ExtensionBoundary(props: ExtensionBoundaryProps) {
 
   return (
     <Suspense fallback={<Progress />}>
-      <ErrorBoundary plugin={plugin} fallback={fallback}>
+      <ErrorBoundary plugin={plugin} Fallback={fallback}>
         <AnalyticsContext attributes={attributes}>
           <RouteTracker disableTracking={!routable}>{children}</RouteTracker>
         </AnalyticsContext>