Use identity server v2 api instead of v1 (#9818)

See js-sdk change.

cypress/support/network.ts

@@ -71,8 +71,8 @@ Cypress.Commands.add("goOnline", (): void => {
 Cypress.Commands.add("stubDefaultServer", (): void => {
     cy.log("Stubbing vector.im and matrix.org network calls");
     // We intercept vector.im & matrix.org calls so that tests don't fail when it has issues
-    cy.intercept("GET", "https://vector.im/_matrix/identity/api/v1", {
-        fixture: "vector-im-identity-v1.json",
+    cy.intercept("GET", "https://vector.im/_matrix/identity/v2", {
+        fixture: "vector-im-identity-v2.json",
     });
     cy.intercept("GET", "https://matrix.org/.well-known/matrix/client", {
         fixture: "matrix-org-client-well-known.json",

src/components/views/settings/SetIdServer.tsx

@@ -50,7 +50,7 @@ async function checkIdentityServerUrl(u) {
     // XXX: duplicated logic from js-sdk but it's quite tied up in the validation logic in the
     // js-sdk so probably as easy to duplicate it than to separate it out so we can reuse it
     try {
-        const response = await fetch(u + "/_matrix/identity/api/v1");
+        const response = await fetch(u + "/_matrix/identity/v2");
         if (response.ok) {
             return null;
         } else if (response.status < 200 || response.status >= 300) {