Bugfix for newly hosted webhook handler.

[themarolt]

Changes proposed ✍️

• Github webhook body was parsed as javascript object not like before when webhook was deployed as a serverless function REST API handler so a few lines had to be changed to make it work with the new api service hosted webhook endpoint

Checklist ✅

• Label appropriately with type:feature 🚀, type:enhancement ✨, type:bug 🐞, or type:documentation 📜.
• Tests are passing.
• New backend functionality has been unit-tested.
• Environment variables have been updated
• API documentation has been updated (if necessary) (see [docs on API documentation](https://docs.crowd.dev/docs/updating-api-documentation)).
• Quality standards are met.
• All changes have been tested in a staging site.
• All changes are working locally running crowd.dev's Docker local environment.

[netlify]

✅ Deploy Preview for open-crowd-prod canceled.

Name	Link
🔨 Latest commit	e483579
🔍 Latest deploy log	https://app.netlify.com/sites/open-crowd-prod/deploys/633be4a6c5882e00099b7532

[netlify]

✅ Deploy Preview for open-devfounders canceled.

Name	Link
🔨 Latest commit	e483579
🔍 Latest deploy log	https://app.netlify.com/sites/open-devfounders/deploys/633be4a64ef5300009da80c8