fix: german letter-position-pretext translation (#185)

Author: jkhsjdhjs

lang.toml

@@ -17,7 +17,7 @@ cover-letter = "Anschreiben"
 attached = "Angehängt"
 curriculum-vitae = "Lebenslauf"
 sincerely = "Mit freundlichen Grüßen"
-letter-position-pretext = "Bewerbung für"
+letter-position-pretext = "Bewerbung als"
 
 [lang.gr]
 resume = "Βιογραφικό"