Cleanup release notes formatting

RELEASES.md

@@ -14,26 +14,17 @@
 
 ## Code changes
 
-- Update CI, bump go min version to 1.19
-  ([#23](https://github.com/maargenton/go-testpredicate/pull/23))
-- Fix CI on Windows runners
-  ([#24](https://github.com/maargenton/go-testpredicate/pull/24))
-- Add support for `t.With(...)` in BDD-style test structure
-  ([#25](https://github.com/maargenton/go-testpredicate/pull/25))
-- Relax implementation of `.IsNotNil()` to return true for any value of a
-  non-nillable type
-  ([#26](https://github.com/maargenton/go-testpredicate/pull/26))
-- Make `.IsError(...)` more flexible
-  ([#27](https://github.com/maargenton/go-testpredicate/pull/27))
+- Update CI, bump go min version to 1.19 ([#23](https://github.com/maargenton/go-testpredicate/pull/23))
+- Fix CI on Windows runners ([#24](https://github.com/maargenton/go-testpredicate/pull/24))
+- Add support for `t.With(...)` in BDD-style test structure ([#25](https://github.com/maargenton/go-testpredicate/pull/25))
+- Relax implementation of `.IsNotNil()` to return true for any value of a non-nillable type ([#26](https://github.com/maargenton/go-testpredicate/pull/26))
+- Make `.IsError(...)` more flexible ([#27](https://github.com/maargenton/go-testpredicate/pull/27))
 
 ## Related issues
 
-- BDD style given-when-then could benefit from a "with" clause
-  ([#22](https://github.com/maargenton/go-testpredicate/issues/22))
-- `IsNotNil()` predicate is too strict
-  ([#20](https://github.com/maargenton/go-testpredicate/issues/20))
-- `.IsError(...)` predicate could be more flexible
-  ([#21](https://github.com/maargenton/go-testpredicate/issues/21))
+- BDD style given-when-then could benefit from a "with" clause ([#22](https://github.com/maargenton/go-testpredicate/issues/22))
+- `IsNotNil()` predicate is too strict ([#20](https://github.com/maargenton/go-testpredicate/issues/20))
+- `.IsError(...)` predicate could be more flexible ([#21](https://github.com/maargenton/go-testpredicate/issues/21))
 
 
 # v1.3.0