Fix release note

Author: rjyounes

docs/release_notes/531-extend-symbol-predicates.md

@@ -1,7 +1,6 @@
 ### Minor Updates
 
-- Extending utility of symbol predicates. Issue [#531](https://github.com/semanticarts/gist/issues/531).
-  - Deprecated `gist:unitSymbol`, `gist:unitSymbolHtml` and `gist:unitSymbolUnicode`. 
-  - Added predicates: `gist:symbol`, `gist:symbolHtml` and `gist:symbolUnicode`.
+- Extended utility of symbol predicates. Issue [#531](https://github.com/semanticarts/gist/issues/531).
+  - Deprecated `gist:unitSymbol`, `gist:unitSymbolHtml`, and `gist:unitSymbolUnicode`.
+  - Added predicate `gist:symbol`.
   - Added symbol triples for existing units, anticipating the removal of `gist:unitSymbol`.
-  - Deleted  `gist:symbolUnicode` and `gist:symbolHtml` since they were added within this change - see above