test: don't match on specific panic

Recent Rust versions (>=1.73.0) changed the wording when using `assert_eq!()`.
This made a test fail, as it was targeted at a specific message. As this
message could change any time (as it's not under our control), just remove
that exact matching, and just match on any panic.

Closes #195.

core/tests/serde_deserialize.rs

@@ -143,7 +143,7 @@ fn ipld_deserialize_link() {
 }
 
 #[test]
-#[should_panic(expected = "assertion failed")]
+#[should_panic]
 fn ipld_deserialize_link_not_as_bytes() {
     let cid = Cid::try_from("bafkreie74tgmnxqwojhtumgh5dzfj46gi4mynlfr7dmm7duwzyvnpw7h7m").unwrap();
     let ipld = Ipld::Link(cid);