Replaced temp strings with final strings

[bradleyrichter]

Test Cases

• Enable rewards and fail CAPTCHA should show error message as Hmmm, not quite...

* enable rewards and fail the CAPTCHA, error message should appear as Hmmm… not quite instead of Hmmm…not quite.

Going to ping @evq to see if there's a way we can test the remaining string changes. It requires the grant server to be put into certain scenarios. - @kjozwiak

Original Issue

issue for PR: brave/brave-core#743

[srirambv]

@bradleyrichter are we still going with Hmmm... not quite. ? or are we changing it to Hmmm, not quite...?

[bradleyrichter]

@srirambv we need to edit this

Could you make a pr for it?

[srirambv]

@bradleyrichter brave/brave-core#808 created and ready for review

[GeetaSarvadnya]

Verification Passed on

Brave	0.56.9 Chromium: 70.0.3538.77 (Official Build) (64-bit)
Revision	0f6ce0b0cd63a12cb4eccea3637b1bc9a29148d9-refs/branch-heads/3538@{#1039}
OS	Windows

• Verified test case comment

Verified passed with

Brave	0.56.9 Chromium: 70.0.3538.77 (Official Build) (64-bit)
Revision	0f6ce0b0cd63a12cb4eccea3637b1bc9a29148d9-refs/branch-heads/3538@{#1039}
OS	Mac OS X

Verified passed with

Brave	0.56.9 Chromium: 70.0.3538.77 (Official Build) (64-bit)
Revision	0f6ce0b0cd63a12cb4eccea3637b1bc9a29148d9-refs/branch-heads/3538@{#1039}
OS	Linux