Correct Documentation Issues and Ensure Proper API Field Naming

[savvar9991]

1.In CONTRIBUTING.md:

-We welcome contributations for bug fixes and performance improvements. +We welcome contributions for bug fixes and performance improvements.

Fixes grammatical error in the word "contributations" (this word doesn't exist)

2.In ops/webhooks/README.md:

-Run ./install-_dependencies.sh +Run ./install_dependencies.sh

Fixes incorrect file naming containing redundant -_ characters Prevents potential command execution errors

3. In packages/api/README.md:

-"estimatedRecieved": "747908", +"estimatedReceived": "747908",

Prevents potential issues with API response parsing by clients expecting correct field naming Improves API documentation quality

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[savvar9991]

@miguelmota Sorry for pinging, but could you please take a look at this PR when you have a moment?