gh-119786: Mention InternalDocs/interpreter.md instead of non-existing adaptive.md (#128329)

`Python/specialize.c`: Mention `InternalDocs/interpreter.md` instead of non-existing `adaptive.md`


Co-authored-by: Peter Bierma <[email protected]>

Author: WolframAlph

Diff for: Python/specialize.c

@@ -21,7 +21,7 @@
 extern const char *_PyUOpName(int index);
 
 /* For guidance on adding or extending families of instructions see
- * ./adaptive.md
+ * InternalDocs/interpreter.md `Specialization` section.
  */
 
 #ifdef Py_STATS