Fix other markdown warnings in ui/README.md

Author: teor2345

tests/ui/README.md

@@ -133,7 +133,7 @@ Runtime panics and error handling generate backtraces to assist in debugging and
 
 This directory was originally meant to contain tests related to time complexity and benchmarking.
 
-However, only a single test was ever added to this category: https://github.com/rust-lang/rust/pull/32062
+However, only a single test was ever added to this category: <https://github.com/rust-lang/rust/pull/32062>
 
 **FIXME**: It is also unclear what would happen were this test to "fail" - would it cause the test suite to remain stuck on this test for a much greater duration than normal?
 
@@ -701,7 +701,6 @@ Tests on lifetime elision in impl function signatures. See [Lifetime elision | N
 Tests for `#![feature(impl_restriction)]`. See [Tracking issue for restrictions #105077
 ](https://github.com/rust-lang/rust/issues/105077).
 
-
 ## `tests/ui/impl-trait/`
 
 Tests for trait impls.
@@ -866,7 +865,7 @@ See:
 
 Tests exercising analysis for unused variables, unreachable statements, functions which are supposed to return a value but do not, as well as values moved elsewhere before they could be used by a function.
 
-**FIXME**: This seems unrelated to "liveness" as defined in the rustc compiler guide. Is this misleadingly named? https://rustc-dev-guide.rust-lang.org/borrow_check/region_inference/lifetime_parameters.html#liveness-and-universal-regions
+**FIXME**: This seems unrelated to "liveness" as defined in the rustc compiler guide. Is this misleadingly named? <https://rustc-dev-guide.rust-lang.org/borrow_check/region_inference/lifetime_parameters.html#liveness-and-universal-regions>
 
 ## `tests/ui/loop-match`