Inconsistencies with casing of "Sign in with Google" across the plugin

[wpdarren]

Bug Description

From the SiWG bug bash. Asana ticket can be found here.

When viewing the setup CTA banner, "Sign in with Google" is cased with "in" and "with" in lower case. However, on the connection screen, the description cases it as "Sign in With Google" where "With" is upper cased.

The official wording is "Sign in with Google" and it should be that way everywhere.

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Acceptance criteria

• Sign in with Google should be written as "Sign in with Google" everywhere, with no alternative capitalisations.

Implementation Brief

• [ ] Replace user-facing strings at https://github.com/google/site-kit-wp/blob/440dcd6e8289a8776acc60ecb3c13f99bfd0ac5a/assets/js/modules/sign-in-with-google/index.js#L73 and https://github.com/google/site-kit-wp/blob/440dcd6e8289a8776acc60ecb3c13f99bfd0ac5a/assets/js/modules/sign-in-with-google/components/setup/SetupForm.js#L58 with "Sign in with Google"
• [ ] Update code comments with the same capitalisation at https://github.com/google/site-kit-wp/blob/440dcd6e8289a8776acc60ecb3c13f99bfd0ac5a/includes/Modules/Sign_In_With_Google.php#L41

Test Coverage

• No new tests needed.

QA Brief

Changelog entry

[eugene-manuilov]

IB ✔