Fix to event details fired from interactive graph. (#1723)

## Summary:
Missing two addtional event details fired from interactive graph

Issue: LEMS-2324

## Test plan:
N/A

Author: catandthemachines

Reviewers: SonicScrewdriver, benchristel, nedredmond

Required Reviewers:

Approved By: SonicScrewdriver

Checks: ✅ Publish npm snapshot (ubuntu-latest, 20.x), ✅ Lint, Typecheck, Format, and Test (ubuntu-latest, 20.x), ✅ Cypress (ubuntu-latest, 20.x), ✅ Check for .changeset entries for all changed files (ubuntu-latest, 20.x), ✅ Publish Storybook to Chromatic (ubuntu-latest, 20.x), ✅ Check builds for changes in size (ubuntu-latest, 20.x), ✅ gerald

Pull Request URL: #1723

.changeset/lovely-ants-itch.md

@@ -0,0 +1,6 @@
+---
+"@khanacademy/perseus": patch
+"@khanacademy/perseus-core": patch
+---
+
+Updating event data sent within interactive graph

packages/perseus-core/src/analytics.ts

@@ -29,6 +29,8 @@ export type PerseusAnalyticsEvent =
           type: "perseus:interactive-graph-widget:rendered";
           payload: {
               type: string;
+              widgetType: string;
+              widgetId: string;
           };
       }
     | {

packages/perseus/src/widgets/interactive-graphs/mafs-graph.tsx

@@ -119,7 +119,11 @@ export const MafsGraph = (props: MafsGraphProps) => {
     useOnMountEffect(() => {
         analytics.onAnalyticsEvent({
             type: "perseus:interactive-graph-widget:rendered",
-            payload: {type},
+            payload: {
+                type,
+                widgetType: "INTERACTIVE_GRAPH",
+                widgetId: "interactive-graph",
+            },
         });
     });