Update test/api-digester/stability-stdlib-abi-without-asserts.test

Co-authored-by: Xiaodi Wu <[email protected]>

Author: benpious

test/api-digester/stability-stdlib-abi-without-asserts.test

@@ -58,6 +58,10 @@ Func MutableCollection.removeSubranges(_:) has been removed
 Func RangeReplaceableCollection.removeSubranges(_:) has been removed
 Struct AnyHashable has added a conformance to an existing protocol _HasCustomAnyHashableRepresentation
 Class AnyKeyPath has added a conformance to an existing protocol CustomDebugStringConvertible
+Class KeyPath has added a conformance to an existing protocol CustomDebugStringConvertible
+Class PartialKeyPath has added a conformance to an existing protocol CustomDebugStringConvertible
+Class ReferenceWritableKeyPath has added a conformance to an existing protocol CustomDebugStringConvertible
+Class WritableKeyPath has added a conformance to an existing protocol CustomDebugStringConvertible
 Struct DiscontiguousSlice has been removed
 Struct RangeSet has been removed
 Subscript Collection.subscript(_:) has been removed