Fix readme code snippets

changed milestone to %2.0.1

added BUG + 1 deleted label

assigned to @schaefed

We can directly read data from the repo with:

pd.read_csv("https://git.ufz.de/rdm-software/saqc/-/raw/develop/ressources/data/data.csv", index_col=0, parse_dates=True)

mentioned in merge request !388 (merged)

mentioned in commit bd4c74d6

closed with merge request !388 (merged)

mentioned in commit 63b55c6d

mentioned in commit 684dc8a0

mentioned in commit 8f7a90e4