fix: corrected options.validate to default true

[tiwarishubham635]

Fixes #1021

Earlier if options is not passed in webhooks, it used to create options = {validate: true} but if options is passed and validate flag is missing (which expects that it will be taken true as it is the default value mentioned in the comments above), then it did not validate. Made a fix for the same.

Checklist

• [x] I acknowledge that all my contributions will be made under the project's license
• [x] I have made a material change to the repo (functionality, testing, spelling, grammar)
• [x] I have read the Contribution Guidelines and my PR follows them
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• [x] I have added tests that prove my fix is effective or that my feature works
• [ ] I have added the necessary documentation about the functionality in the appropriate .md file
• [ ] I have added inline documentation to the code I modified

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[sonarcloud[bot]]

Quality Gate passed

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0 New issues
0 Accepted issues

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100.0% Coverage on New Code
0.0% Duplication on New Code

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