get-garage-sign.py: Use ota.here.com CNAME for the bucket.

[pattivacek]

No description provided.

[codecov-io]

Codecov Report

Merging #1622 into master will increase coverage by 0.04%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##           master    #1622      +/-   ##
==========================================
+ Coverage   82.46%   82.50%   +0.04%     
==========================================
  Files         189      189              
  Lines       12004    12004              
==========================================
+ Hits         9899     9904       +5     
+ Misses       2105     2100       -5     

Impacted Files	Coverage Δ
src/libaktualizr/storage/sqlstorage.cc	77.21% <0.00%> (-0.29%)	⬇️
src/libaktualizr/package_manager/ostreemanager.cc	79.77% <0.00%> (+0.73%)	⬆️
src/libaktualizr/storage/sqlstorage_base.cc	80.53% <0.00%> (+4.02%)	⬆️

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