Fix: (org-ql-find) Use org-with-point-at

I keep pointing out to other people that they should use
org-with-point-at, but I still have places in my own code where I need
to use it, too!

org-ql.info

@@ -1037,6 +1037,7 @@ File: README.info,  Node: 072-pre,  Next: 071,  Up: Changelog
      selection of results.  (#351
      (https://github.com/alphapapa/org-ql/issues/351).  Thanks to Daniel
      Fleischer (https://github.com/danielfleischer) for reporting.)
+   • Handle narrowed buffers correctly in ‘org-ql-find’.
 
 
 File: README.info,  Node: 071,  Next: 07,  Prev: 072-pre,  Up: Changelog
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