Add corrections for 'fruther' and 'fruthermore'

codespell_lib/data/dictionary.txt

diff --git a/codespell_lib/data/dictionary.txt b/codespell_lib/data/dictionary.txt
index 76ab705..4af0c61 100644
--- a/codespell_lib/data/dictionary.txt
+++ b/codespell_lib/data/dictionary.txt
@@ -29428,6 +29428,8 @@
 frrom->from
 frustrum->frustum
 frustrums->frustums, frusta,
+fruther->further
+fruthermore->furthermore
 fschk->fsck
 FTBS->FTBFS
 fter->after