pythongh-119786: fix broken links in docs and comment (python#121601)

Author: iritkatriel

Include/internal/pycore_frame.h

@@ -13,7 +13,7 @@ extern "C" {
 #include "pycore_code.h"          // STATS
 #include "pycore_stackref.h"      // _PyStackRef
 
-/* See Objects/frame_layout.md for an explanation of the frame stack
+/* See InternalDocs/frames.md for an explanation of the frame stack
  * including explanation of the PyFrameObject and _PyInterpreterFrame
  * structs. */
 

InternalDocs/compiler.md

@@ -623,8 +623,8 @@ Important files
 Objects
 =======
 
-* [Objects/locations.md](https://github.com/python/cpython/blob/main/Objects/locations.md): Describes the location table
-* [Objects/frame_layout.md](https://github.com/python/cpython/blob/main/Objects/frame_layout.md): Describes the frame stack
+* [Locations](locations.md): Describes the location table
+* [Frames](frames.md): Describes frames and the frame stack
 * [Objects/object_layout.md](https://github.com/python/cpython/blob/main/Objects/object_layout.md): Describes object layout for 3.11 and later
 * [Exception Handling](exception_handling.md): Describes the exception table