docs: update integrations.rst

[MichaelCurrin]

• Fixed grammar - replace a when as a was needed.
• Remove redundancy. Like no need to mention Falcon twice here when you already in the Falcon section.

  - For Falcon you can use FalconOpenAPIRequest a Falcon request factory:
  + You can use `FalconOpenAPIRequest` as a Falcon request factory:

• Add backticks around classes
• Use single space in URLs (some had 1 and some had 2)

[MichaelCurrin]

Also possible improvement for Requests, to make openapi_request explicit.

requests_response = requests.get(url)

openapi_request = RequestsOpenAPIRequest(requests_response.request)
openapi_response = RequestsOpenAPIResponse(requests_response)
validator = RequestValidator(spec)
result = validator.validate(openapi_request, openapi_response)

I haven't run this though but guessing based on my use of requests library.

[p1c2u]

LGTM

[codecov]

Codecov Report

Merging #364 (77c00cf) into master (e0637b5) will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##           master     #364   +/-   ##
=======================================
  Coverage   96.72%   96.72%           
=======================================
  Files          80       80           
  Lines        1743     1743           
=======================================
  Hits         1686     1686           
  Misses         57       57           

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[p1c2u]

@MichaelCurrin thank you for the contribution