Move Regierungsbezirke, Kreise, Gemeinden etc. under 05

[fsteeg]

Moved out of #86. See details starting at https://github.com/hbz/lobid-vocabs/issues/86#issuecomment-498195821.

[acka47]

As discussed, we will have to change to notations from their current value as used in hbz01:

• 05 Westfalen -> 04 Westfalen
• 91 Euregio -> 91 :question: (We will have to ask editors about the new notation)

[fsteeg]

Duplicate of https://github.com/hbz/lobid-vocabs/issues/93, which has more info, so closing this.