test(shared): clarify explicit port coverage

Generated-By: PostHog Code
Task-Id: 864ed341-adf3-40b7-b37c-baef45c4f05d

Author: k11kirky

packages/shared/src/url.test.ts

@@ -6,13 +6,16 @@ describe("isSafeExternalUrl", () => {
     "https://github.com/PostHog/code/pull/42",
     "http://example.com",
     "https://example.com/path?q=1#frag",
-    "https://example.com:443/path",
     "HTTPS://EXAMPLE.COM",
     "mailto:hi@posthog.com",
   ])("allows %s", (url) => {
     expect(isSafeExternalUrl(url)).toBe(true);
   });
 
+  it("allows HTTPS URLs with an explicit port", () => {
+    expect(isSafeExternalUrl("https://example.com:8443/path")).toBe(true);
+  });
+
   it.each([
     "javascript:alert(1)",
     "file:///etc/passwd",