v1.6.3.30 docs(NEWS): add explanation in the NEWS file

Refs #65
3 jobs for outputsGR1A in 10 minutes and 46 seconds (queued for 1 second)
Status Job ID Name Coverage
  Build
passed #127527
build_patched

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  Tests
passed #127529
check_as_cran_patched

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passed #127528
check_not_cran_patched

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