fix(tool): Fix cspell for Dart raw strings

Signed-off-by: jld3103 <jld3103yt@gmail.com>

.cspell/nextcloud.txt

@@ -37,9 +37,6 @@ publicpreview
 reshares
 resharing
 rgdnvw
-r'sharebymail
-r'updatenotification
-r'uppush
 shareapi
 sharebymail
 sharee

tool/update-cspell-dictionaries.sh

@@ -4,5 +4,5 @@ cd "$(dirname "$0")/.."
 
 for file in .cspell/*; do
   rm "$file"
-  cspell lint --quiet --unique --words-only . | tr '[:upper:]' '[:lower:]' | sort -f | uniq > "$file" || true
+  cspell lint --quiet --unique --words-only . | tr '[:upper:]' '[:lower:]' | sed "s/^r'//" | sort -f | uniq > "$file" || true
 done