chore: update error message check (#2830)

The latest version of chrome changes the error message thrown from
`signal.throwIfAborted`

Author: achingbrain

packages/transport-webrtc/test/peer.spec.ts

@@ -155,7 +155,7 @@ describe('webrtc basic', () => {
       }),
       handleIncomingStream(recipient)
     ]))
-      .to.eventually.be.rejected.with.property('message', 'Oh noes!')
+      .to.eventually.be.rejected.with.property('message').that.matches(/Oh noes!/)
   })
 })