Fixing files extensions

[the-eternal-newbie]

Description

There were several files that did not meet the contribution guidelines (files with typos), others that were not in the corresponding folders, and finally some files that did not even have a file extension.

Examples

Hacktoberfest
│   README.md
│   requirements.txt   
│   ...
└───A
│   │   amend.json  // Files must start with a capital letter
│   
└───B
│   │   beef            // File without file extension
│   │   ...
│   
└───hword        // file outside its corresponding folder

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