Typo errors in README file

Typo errors in the hostname example in the readme file and fix of many other typos.

-$settings['redis.connection']['host'] = '127.0.0.1;
+$settings['redis.connection']['host'] = '127.0.0.1';

Version: 8.x-1.6

Hi Munavijayalakshmi,

I confirmed the typo issue was resolved when I applied patch #3 to the "Redis" module against Version 8.x-1.x-dev.
Please see the screenshots attached as a sample of the many typos that the patch fixed.

For your review.
Thank you.