UrlEncode patterns in cosmetics.json (#1273)

## Description:

Use base64url encoding for patterns.

## Please complete the following:

- [x] I have added screenshots for all UI updates
- [x] I process any text displayed to the user through translateText()
and I've added it to the en.json file
- [x] I have added relevant tests to the test directory
- [x] I confirm I have thoroughly tested these changes and take full
responsibility for any bugs introduced
- [x] I understand that submitting code with bugs that could have been
caught through manual testing blocks releases and new features for all
contributors

src/core/Schemas.ts

@@ -182,7 +182,7 @@ export const FlagSchema = z.string().max(128).optional();
 export const RequiredPatternSchema = z
   .string()
   .max(128)
-  .base64()
+  .base64url()
   .refine(
     (val) => {
       try {