Rename CSV file to export_brevetcard.csv

.gitignore

@@ -11,8 +11,8 @@
 *.pdf
 *.bak
 
-# Real participant data (copy to "Export Brevetkarte.csv" and fill in)
-Export Brevetkarte.csv
+# Real participant data (copy export_brevetcard.csv.example and fill in)
+export_brevetcard.csv
 
 # Real event data (copy event.yml.example to event.yml and fill in)
 event.yml