logback: status change on tests.reproducible-builds.org/debian

[Reproducible Builds folks]

Dear maintainer,

The reproducibility status of the package logback changed during the
continuous testing.
See the following notes for more details:

2021-02-04 05:01 https://tests.reproducible-builds.org/debian/unstable/amd64/logback changed from FTBR -> reproducible

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this automatic notification.

-- 
The Reproducible Builds folks