refactor: replace 'format' with 'pattern' in deprecated example/test (badges#11812)

part of issue badges#3329
helps unblock badges#11800

Co-authored-by: Copilot <copilot@github.com>

Author: jNullj

core/base-service/deprecated-service.spec.js

@@ -4,7 +4,7 @@ import deprecatedService from './deprecated-service.js'
 describe('DeprecatedService', function () {
   const route = {
     base: 'service/that/no/longer/exists',
-    format: '(?:.+)',
+    pattern: ':various+',
   }
   const category = 'analysis'
   const dateAdded = new Date()

doc/deprecating-badges.md

@@ -24,7 +24,7 @@ export default deprecatedService({
   category: 'size',
   route: {
     base: 'imagelayers',
-    format: '(?:.+?)',
+    pattern: ':various+',
   },
   label: 'imagelayers',
   dateAdded: new Date('2019-xx-xx'), // Be sure to update this with today's date!