Fix invite test flake (#29753)

* Mask mxid from screenshot

* s/hot/not/

Co-authored-by: Michael Telatynski <7t3chguy@gmail.com>

* Hide the mxid entirely

* Add new snapshot

---------

Co-authored-by: Michael Telatynski <7t3chguy@gmail.com>

playwright/e2e/room/invites.spec.ts

@@ -19,7 +19,14 @@ test.describe("Invites", () => {
         const roomId = await bot.createRoom({ is_direct: true });
         await bot.inviteUser(roomId, user.userId);
         await app.viewRoomByName("Bob");
-        await expect(page.locator(".mx_RoomView")).toMatchScreenshot("Invites_room_view.png");
+        await expect(page.locator(".mx_RoomView")).toMatchScreenshot("Invites_room_view.png", {
+            // Hide the mxid, which is not stable.
+            css: `
+                .mx_RoomPreviewBar_inviter_mxid {
+                    display: none !important;
+                }
+            `,
+        });
     });
 
     test("should be able to decline an invite", async ({ page, homeserver, user, bot, app }) => {