feat(form-labels): Adds new form labels for dc_publisher e dc_relation_issn

ref: DURACOM-481

Author: AdamF42

src/assets/i18n/en.json5

@@ -2191,6 +2191,10 @@
 
   "form.no-value": "No value entered",
 
+  "form.other-information.dc_publisher": "Publisher",
+
+  "form.other-information.dc_relation_issn": "ISSN",
+
   "form.other-information.email": "Email",
 
   "form.other-information.first-name": "First Name",