Target specific thread name to unflake redaction tests (#11662)

* Disambiguate thread root names to unflake redaction tests

* Revert "Disambiguate thread root names to unflake redaction tests"

This reverts commit f21ffa5.

* Find thread root by text, not contains

cypress/e2e/read-receipts/read-receipts-utils.ts

@@ -285,7 +285,9 @@ function findRoomByName(room: string): Chainable<Room> {
 export function openThread(rootMessage: string) {
     cy.log("Open thread", rootMessage);
     cy.get(".mx_RoomView_body", { log: false }).within(() => {
-        cy.contains(".mx_EventTile[data-scroll-tokens]", rootMessage, { log: false })
+        cy.findAllByText(rootMessage)
+            .filter(".mx_EventTile_body")
+            .parents(".mx_EventTile[data-scroll-tokens]")
             .realHover()
             .findByRole("button", { name: "Reply in thread", log: false })
             .click();