Update umlaut characters in the config

The characters originally placed in the config file used unicode "combining characters" for the umlauts, rather than the more common characters that have the umlaut embedded. This replaces the characters so they match the characters we are receiving in metadata emails.

Long-term, it is better to perform all of these comparisons using the journal code rather than the journal name. Unfortunately, there are many places where we read a journal name directly out of the DSpace item, since the DSpace items don't contain the journal codes. Storing journal codes in the DSpace items will be a bigger project...