dict: update dictionary.txt with 'aletr' variants (#3703)

Co-authored-by: pre-commit-ci[bot] <66853113+pre-commit-ci[bot]@users.noreply.github.com>

Author: mdeweerd

codespell_lib/data/dictionary.txt

@@ -3123,6 +3123,18 @@ alernative->alternative
 alernatively->alternatively
 alernatives->alternatives
 alers->alerts, alters,
+aletr->alert, alter,
+aletred->alerted, altered,
+aletring->alerting, altering,
+aletrnate->alternate
+aletrnated->alternated
+aletrnately->alternately
+aletrnates->alternates
+aletrnating->alternating
+aletrnative->alternative
+aletrnatively->alternatively
+aletrnatives->alternatives
+aletrs->alerts, alters,
 aleviate->alleviate
 aleviates->alleviates
 aleviating->alleviating