Add specicification (and pl) typo

https://github.com/search?q=specicification&type=code
gives 234 hits, so not that many but clearly out there

Author: yarikoptic

codespell_lib/data/dictionary.txt

@@ -54884,6 +54884,8 @@ specical->special
 specically->specifically
 specication->specification
 specications->specifications
+specicification->specification
+specicifications->specifications
 specidic->specific
 specied->specified
 speciefic->specific