Bug 40073: MARC21 Addition to relator terms in technical notice 2025-02-06

This patch adds new relator terms that were added to the MARC code list
for relators in the Februrary 2, 2025 technical notice. The new terms
are ink - Inker, and pnc - Penciller.

To test:
1. Apply patch and reset_all
2. Go to Administration > Authorized values
3. Search for the RELTERMS list and click on it
4. Search for ink
   --> There should be an entry for ink - Inker
5. Search for pnc
   --> There should be an entry for pnc - Penciller

Signed-off-by: Roman Dolny <roman.dolny@jezuici.pl>
Signed-off-by: David Nind <david@davidnind.com>
Signed-off-by: Lucas Gass <lucas@bywatersolutions.com>

installer/data/mysql/en/optional/marc21_relatorterms.yml

@@ -586,6 +586,10 @@ tables:
           authorised_value: "ilu"
           lib: "Illuminator"
 
+        - category: "RELTERMS"
+          authorised_value: "ink"
+          lib: "Inker"
+
         - category: "RELTERMS"
           authorised_value: "ins"
           lib: "Inscriber"
@@ -830,6 +834,10 @@ tables:
           authorised_value: "pmn"
           lib: "Production manager"
 
+        - category: "RELTERMS"
+          authorised_value: "pnc"
+          lib: "Penciller"
+
         - category: "RELTERMS"
           authorised_value: "pop"
           lib: "Printer of plates"