Add entry for RESTler fuzzer.

[marina-p]

Add entry for RESTler fuzzer. Closes #261

[marina-p]

After going through all the categories, the 'security' tag was the closest fit.

For language I put 'Any' since it is a command line tool, let me know if there is a more appropriate label.

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In reply to: 840315158

[matthewtrask]

hm why did the whole tools.yml file get updated?

I think for language, putting CLI/Bash may be best?

[marina-p]

Thanks, will fix shortly

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In reply to: 841571116

[marina-p]

I believe the whole file updating issue is now fixed.

[darrelmiller]

@marina-p We can merge this entry. However the readme of the project uses the term "Swagger" when it means OpenAPI. The contributing guidelines say,

Try and avoid using the word "Swagger" unless you work for SmartBear and are literally talking about the Swagger toolsuite. It's been called OpenAPI for years now.

[mikekistler]

@darrelmiller The RESTler README has been updated to use "OpenAPI" as requested.

[darrelmiller]

Thank you @mikekistler