Fix Ruby's send SMS with Twillio docs

[fagiani]

This commit fixes copy issues:

• Some places where it should read Ruby and instead was Python
• An incorrect path
• A place where it should read with and instead was without
• There was a warning pointing to replace a value that was set with another name

[adityaoberai]

Thanks for the fixes @fagiani
Just a couple of minor changes that need to be made and then this should be good to go 👍

[PineappleIOnic]

Thank you so much for the PR 🤩. We're adding the hacktoberfest-accepted label to ensure this PR counts towards your Hacktoberfest contributions count. With that said, please stay active on this PR to address any comments once you receive a review. Happy Hacktoberfest! 🎃

[adityaoberai]

LGTM 👍

[christyjacob4]

THANK YOU! All changes merged 🥳

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