Fix indentation coding standards for phone_number.schema.yml and sms_phone_number.schema.yml

Problem/Motivation

/var/www/html/modules/contrib/phone_number/config/schema/phone_number.schema.yml
line 39	Expected indentation of 6 spaces but found 5 spaces. (yml/indent)
40	Expected indentation of 6 spaces but found 5 spaces. (yml/indent)
42	Expected indentation of 6 spaces but found 5 spaces. (yml/indent)
43	Expected indentation of 6 spaces but found 5 spaces. (yml/indent)
45	Expected indentation of 6 spaces but found 5 spaces. (yml/indent)
46	Expected indentation of 6 spaces but found 5 spaces. (yml/indent)
48	Expected indentation of 6 spaces but found 5 spaces. (yml/indent)
49	Expected indentation of 6 spaces but found 5 spaces. (yml/indent)
57	Expected indentation of 6 spaces but found 5 spaces. (yml/indent)
58	Expected indentation of 6 spaces but found 5 spaces. (yml/indent)
69	Expected indentation of 6 spaces but found 5 spaces. (yml/indent)
70	Expected indentation of 6 spaces but found 5 spaces. (yml/indent)

/var/www/html/modules/contrib/phone_number/modules/sms_phone_number/config/schema/sms_phone_number.schema.yml
36	Expected indentation of 6 spaces but found 5 spaces. (yml/indent)
37	Expected indentation of 6 spaces but found 5 spaces. (yml/indent)
45	Expected indentation of 6 spaces but found 5 spaces. (yml/indent)
46	Expected indentation of 6 spaces but found 5 spaces. (yml/indent)
48	Expected indentation of 6 spaces but found 5 spaces. (yml/indent)
49	Expected indentation of 6 spaces but found 5 spaces. (yml/indent)

Proposed resolution

Fix the code.

Remaining tasks

Provide the fix.

User interface changes

-

API changes

-

Data model changes

-