Dict: Add suggestion

See
https://github.com/codespell-project/codespell/pull/1823/files#r557008281
diff --git a/codespell_lib/data/dictionary.txt b/codespell_lib/data/dictionary.txt
index b0fbc4b..02e8120 100644
--- a/codespell_lib/data/dictionary.txt
+++ b/codespell_lib/data/dictionary.txt
@@ -28986,7 +28986,7 @@
 uneccessarily->unnecessarily
 unecessarily->unnecessarily
 unecessary->unnecessary
-uneeded->unneeded, needed,
+uneeded->unneeded, unheeded, needed,
 uneforceable->unenforceable
 uneform->uniform
 unencrpt->unencrypt