Bug 37969: Add missing language code nor

Bug 37969: Add missing language code nor

Signed-off-by: Magnus Enger <magnus@libriotech.no>
Test plan:
- Start KTD with Elastic: ktd --es7 up
- Edit a record, e.g. "Dom Casmurro : a novel" and change the language
  code in 008/35-37 from "eng" to "nor":
  Before: 980914s1997    nyu           00011 eng b
  After:  980914s1997    nyu           00011 nor b
- Do a search that finds the edited record and some other records,
  so you can see the list of resulots and the facets, e.g. "dom"
- Verify that "nor" is shown in the languages facet
- Apply this patch and run koha-upgrade-schema kohadev
- Do the search again and verify that "Norwegian" is now shown instead
  of "nor"

Signed-off-by: Thomas Klausner <domm@plix.at>
Signed-off-by: Katrin Fischer <katrin.fischer@bsz-bw.de>