RelNotes: clarify "bisect run unexecutable" tweak

We do not have to guess how common the mistake the change targets is
when describing it.  Such an argument may be good while proposing a
change, but does not quite belong in the record of what has already
happened, i.e. a release note.

Helped-by: Taylor Blau <me@ttaylorr.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

Author: gitster

Documentation/RelNotes/2.36.0.txt

@@ -46,10 +46,10 @@ UI, Workflows & Features
 
  * "git branch" learned the "--recurse-submodules" option.
 
- * A not-so-common mistake is to write a script to feed "git bisect
-   run" without making it executable, in which case all tests will
-   exit with 126 or 127 error codes, even on revisions that are marked
-   as good.  Try to recognize this situation and stop iteration early.
+ * A user can forget to make a script file executable before giving
+   it to "git bisect run".  In such a case, all tests will exit with
+   126 or 127 error codes, even on revisions that are marked as good.
+   Try to recognize this situation and stop iteration early.
 
  * When "index-pack" dies due to incoming data exceeding the maximum
    allowed input size, include the value of the limit in the error