Add spelling correction for "agos".

Author: cfi-gb

codespell_lib/data/dictionary.txt

@@ -2800,6 +2800,7 @@ agonsticism->agnosticism
 agorithm->algorithm
 agorithmic->algorithmic
 agorithms->algorithms
+agos->ago, ages, Lagos,
 agracultural->agricultural
 agrain->again
 agrandize->aggrandize