Update tests/ui/impl-trait/impl-fn-rpit-opaque-107883.rs

Co-authored-by: waffle <[email protected]>

Author: LFS6502

tests/ui/impl-trait/impl-fn-rpit-opaque-107883.rs

@@ -1,6 +1,5 @@
 //@ check-pass
-// Regression test for #107883: Returning `impl Fn(T) -> impl Trait`
-// This compiles since #122077: Pass list of defineable opaque types into canonical queries
+// Regression test for <https;//github.com/rust-lang/rust/issues/107883>
 #![feature(impl_trait_in_fn_trait_return)]
 #![feature(unboxed_closures)] // only for `h`