[K/N] fix minor typos and outdated documentation

kotlin-native/runtime/src/main/cpp/Memory.h

@@ -170,7 +170,7 @@ void ClearMemoryForTests(MemoryState*);
 // Arena containers are not reference counted, and is explicitly freed when leaving
 // its owner frame.
 // Escape analysis algorithm is the provider of information for decision on exact aux slot
-// selection, and comes from upper bound esteemation of object lifetime.
+// selection, and comes from upper bound estimation of object lifetime.
 //
 OBJ_GETTER(AllocInstance, const TypeInfo* type_info) RUNTIME_NOTHROW;
 

kotlin-native/runtime/src/main/cpp/Utils.hpp

@@ -56,7 +56,7 @@ protected:
     ~Pinned() = default;
 };
 
-// A helper that scopley assings a value to a variable. The variable will
+// A helper that scopley assigns a value to a variable. The variable will
 // be set to its original value upon destruction of the AutoReset instance.
 // Note that an AutoReset instance must have a shorter lifetime than
 // the variable it works with to avoid invalid memory access.