Added conversion for acknowledgment
diff --git a/codespell_lib/data/dictionary_en-GB_to_en-US.txt b/codespell_lib/data/dictionary_en-GB_to_en-US.txt
index a3f93f1..d113460 100644
--- a/codespell_lib/data/dictionary_en-GB_to_en-US.txt
+++ b/codespell_lib/data/dictionary_en-GB_to_en-US.txt
@@ -1,3 +1,4 @@
+acknowledgement->acknowledgment
 amortised->amortized
 analyse->analyze
 analysed->analyzed