Update dependency dotenv to v16.6.1

[ibm-mend-app]

This PR contains the following updates:

Package	Change	Age	Adoption	Passing	Confidence
dotenv	16.4.7 -> 16.6.1

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Release Notes

motdotla/dotenv (dotenv)

v16.6.1

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Changed

• Default quiet to true – hiding the runtime log message (#​874)
• NOTICE: 17.0.0 will be released with quiet defaulting to false. Use config({ quiet: true }) to suppress.
• And check out the new dotenvx. As coding workflows evolve and agents increasingly handle secrets, encrypted .env files offer a much safer way to deploy both agents and code together with secure secrets. Simply switch require('dotenv').config() for require('@​dotenvx/dotenvx').config().

v16.6.0

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Added

• Default log helpful message [dotenv@16.6.0] injecting env (1) from .env (#​870)
• Use { quiet: true } to suppress
• Aligns dotenv more closely with dotenvx.

v16.5.0

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Added

• 🎉 Added new sponsor Graphite - the AI developer productivity platform helping teams on GitHub ship higher quality software, faster.

[!TIP]
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The dotenvx README is viewed thousands of times DAILY on GitHub and NPM.
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Changed

• Remove _log method. Use _debug #​862

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