Update README.md

[anjor]

broken links

[codecov-commenter]

Codecov Report

Merging #779 (432bcdf) into master (0fccfc9) will not change coverage.
The diff coverage is n/a.

Additional details and impacted files

@@           Coverage Diff           @@
##           master     #779   +/-   ##
=======================================
  Coverage   57.66%   57.66%           
=======================================
  Files          66       66           
  Lines        5564     5564           
=======================================
  Hits         3208     3208           
  Misses       2013     2013           
  Partials      343      343           

Impacted Files	Coverage Δ
retrievalmarket/impl/client.go	71.05% <ø> (ø)
retrievalmarket/impl/clientstates/client_states.go	95.32% <ø> (ø)
retrievalmarket/impl/dtutils/dtutils.go	81.20% <ø> (ø)
retrievalmarket/impl/provider_environments.go	66.67% <ø> (ø)
...market/impl/requestvalidation/requestvalidation.go	80.19% <ø> (ø)
retrievalmarket/migrations/migrations.go	68.46% <ø> (ø)
retrievalmarket/network/libp2p_impl.go	84.91% <ø> (ø)
retrievalmarket/network/old_query_stream.go	77.15% <ø> (ø)
retrievalmarket/network/query_stream.go	60.00% <ø> (ø)
retrievalmarket/types.go	58.03% <ø> (ø)
... and 16 more