docs: update `options.md` to add a warning about environments

[arturovt]

This commit updates the options section of the documentation to include information on generating environments because they are no longer present by default.

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BundleMon (Integration Projects)

Files updated (2)

Status | Path | Size | Limits :------------: | ------------ | :------------: | :------------: :white_check_mark: | Main bundles(Gzip)
_{hello-world-ng16/dist-integration/main.(hash)
.js}
| 67.54KB (+525B +0.76%) | +1% :white_check_mark: | Main bundles(Gzip)
_{hello-world-ng17/dist-integration/main.(hash)
.js}
| 68.53KB (+30B +0.04%) | +1%

Total files change +555B +0.4%

Final result: :white_check_mark:

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Current branch size history | Target branch size history