Doc: Missing multi-arch flag in devtron documentation README.md

[ayu-devtron]

💭 Description

While multi-arch support is mentioned in https://docs.devtron.ai/ but its not mentioned in README.md of github. Its a crucial step while installation which should be mentioned in README.md as well

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• I checked and didn't find similar issue

🏢 Have you read the Code of Conduct?

• I have read the Code of Conduct

AB#9914

[ayu-devtron]

this is fixed now