Reformulate documentation of ABSL_LOCKS_EXCLUDED.

The intent of the macro is to say what locks cannot be held when calling the method, not making a promise that they will be acquired.

PiperOrigin-RevId: 454158686
Change-Id: I71087460c3df27c7d6e0571156f19f525024f1de

absl/base/thread_annotations.h

@@ -154,8 +154,8 @@
 
 // ABSL_LOCKS_EXCLUDED()
 //
-// Documents the locks acquired in the body of the function. These locks
-// cannot be held when calling this function (as Abseil's `Mutex` locks are
+// Documents the locks that cannot be held by callers of this function, as they
+// might be acquired by this function (Abseil's `Mutex` locks are
 // non-reentrant).
 #if ABSL_HAVE_ATTRIBUTE(locks_excluded)
 #define ABSL_LOCKS_EXCLUDED(...) __attribute__((locks_excluded(__VA_ARGS__)))