[utilities] make pattern match more accurate (#15575)

Author: phrawzty

utilities/change_sponsor_logo.sh

@@ -50,7 +50,7 @@ cp "$IMAGE_FILE" "$OLD_STATIC_IMAGE"
 cp "$SPONSOR_FILE" "$OLD_SPONSOR_FILE"
 
 # Find all events with this sponsor in years other than this year, excluding existing renames
-SPONSOR_REGEX="id:[ ]+$SPONSOR_NAME[ $]*"
+SPONSOR_REGEX="id:[ ]+$SPONSOR_NAME[ ]*$"
 pushd "$(gitroot)/data/events" > /dev/null
 EVENTS_TO_MODIFY=($(git ls-tree -r --name-only HEAD | xargs grep -E "$SPONSOR_REGEX" | grep -v 'before' | grep -v "^$(date +%Y)" | cut -d ':' -f 1))