Fix image in KEDA HTTPRequestsScaler

[rohitsrma]

Description

This PR fixes #1878 and a part of #1578

Before

After

The file 'wordpress-operator-color.svg' is also missing, but I couldn't find anything similar in the 'images/integration'

Notes for Reviewers

Signed commits

• Yes, I signed my commits.

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[Ashparshp]

@rohitsrma. Thanks for your contribution, let's discuss this on the website's call. Please add this as an agenda item to the meeting minutes.

[vishalvivekm]

@rohitsrma the markdown files are updated frequently by the workflow and so your changes will be overwritten the next time.
will you create a new svg named keda in the same location copying the content of keda-http-scaler svg into it ?

here's the wordpress operator's svg; https://layer5.io/static/45f4ecdbe48af78ccc58d8486f93e81f/wordpress-operator-color.svg