Fix contacts relationships field is confusing

Fixed by changing the heading to `Related people` because the field is
 between a contact and another person, not between the contact book
 owner and the contact

Close #8681

src/common/misc/TranslationKey.ts

@@ -2108,3 +2108,4 @@ export type TranslationKeyType =
 	| "zoomIn_action"
 	| "zoomOut_action"
 	| "emptyString_msg"
+	| "relatedPeople_label"

src/mail-app/contacts/ContactEditor.ts

@@ -243,7 +243,7 @@ export class ContactEditor {
 					]),
 				]),
 				m(".relationship.mt-xl", [
-					m(".h4", lang.get("relationships_label")),
+					m(".h4", lang.get("relatedPeople_label")),
 					m(".aggregateEditors", [
 						this.relationships.map(([relationship, id], index) => {
 							const lastEditor = index === lastIndex(this.relationships)

src/mail-app/contacts/view/ContactViewer.ts

@@ -289,7 +289,7 @@ export class ContactViewer implements ClassComponent<ContactViewerAttrs> {
 					m(".dates.mt-l", dates.length > 0 ? [m(".h4", lang.get("dates_label")), m(".aggregateEditors", dates)] : null),
 					m(
 						".relationships.mt-l",
-						relationships.length > 0 ? [m(".h4", lang.get("relationships_label")), m(".aggregateEditors", relationships)] : null,
+						relationships.length > 0 ? [m(".h4", lang.get("relatedPeople_label")), m(".aggregateEditors", relationships)] : null,
 					),
 				])
 			: null

src/mail-app/translations/de_sie.ts

@@ -2132,6 +2132,7 @@ export default {
 		"yourMessage_label": "Ihre Nachricht",
 		"you_label": "Sie",
 		"zoomIn_action": "Hereinzoomen",
-		"zoomOut_action": "Herauszoomen"
+		"zoomOut_action": "Herauszoomen",
+		"relatedPeople_label": "Related people"
 	}
 }

src/mail-app/translations/en.ts

@@ -2128,6 +2128,7 @@ export default {
 		"yourMessage_label": "Your message",
 		"you_label": "You",
 		"zoomIn_action": "Zoom In",
-		"zoomOut_action": "Zoom Out"
+		"zoomOut_action": "Zoom Out",
+		"relatedPeople_label": "Related people"
 	}
 }