Adding dayOfweek feature in rtdModule

[pm-tanishka-vishwakarma]

Type of change

• Bugfix
• Feature
• New bidder adapter
• Code style update (formatting, local variables)
• Refactoring (no functional changes, no api changes)
• Build related changes
• CI related changes
• Does this change affect user-facing APIs or examples documented on http://prebid.org?
• Other

Description of change

Adding dayOfweek feature in rtdModule

Be sure to test the integration with your adserver using the [Hello World](/integrationExamples/gpt/hello_world.html) sample page.

- contact email of the adapter’s maintainer
- [ ] official adapter submission

For any changes that affect user-facing APIs or example code documented on http://prebid.org, please provide:

- A link to a PR on the docs repo at https://github.com/prebid/prebid.github.io/

## Other information
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