fix: upgrading deprecated terminology

[Mastermind-sap]

Description

Upgrading deprecated terminology of taskserver's environment value

Checklist

• Ran npx prettier --write . (for formatting)
• Ran gofmt -w . (for Go backend)
• Ran npm test (for JS/TS testing)
• Added unit tests, if applicable
• Verified all tests pass
• Updated documentation, if needed

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[its-me-abhishek]

Need to look into this. Since the versions are pinned in Dockerfiles, etc., hence nothing breaks. Closing until more context/results/reports are there