fix: Escape regex for embeds (#3907)

Fixes #3899

shared/editor/embeds/ModeAnalytics.test.ts

@@ -13,5 +13,11 @@ describe("ModeAnalytics", () => {
     expect("https://modeanalytics.com".match(match)).toBe(null);
     expect("https://modeanalytics.com/outline".match(match)).toBe(null);
     expect("https://modeanalytics.com/outline/reports".match(match)).toBe(null);
+    expect(
+      "https://modeanalyticsscom/outline/reports/5aca06064f56".match(match)
+    ).toBe(null);
+    expect(
+      "https://wwwwmodeanalytics.com/outline/reports/5aca06064f56".match(match)
+    ).toBe(null);
   });
 });