FIX: Fixes Blueliv collector requirements

[gethvi]

This PR fixes the following error (when running pip3 install -r intelmq/bots/collectors/blueliv/REQUIREMENTS.txt):

Collecting git+git://github.com/Blueliv/api-python-sdk (from -r /tmp/intelmq/intelmq/bots/collectors/blueliv/REQUIREMENTS.txt (line 1))
  Cloning git://github.com/Blueliv/api-python-sdk to /tmp/pip-req-build-uiy3i5_1
  Running command git clone -q git://github.com/Blueliv/api-python-sdk /tmp/pip-req-build-uiy3i5_1
  fatal: remote error:
    The unauthenticated git protocol on port 9418 is no longer supported.
  Please see https://github.blog/2021-09-01-improving-git-protocol-security-github/ for more information.
ERROR: Command errored out with exit status 128: git clone -q git://github.com/Blueliv/api-python-sdk /tmp/pip-req-build-uiy3i5_1 Check the logs for full command output.

[codecov-commenter]

Codecov Report

Merging #2161 (9e90d0a) into develop (ce60fd4) will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff            @@
##           develop    #2161   +/-   ##
========================================
  Coverage    76.34%   76.34%           
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  Files          441      441           
  Lines        23649    23649           
  Branches      3739     3739           
========================================
  Hits         18055    18055           
  Misses        4857     4857           
  Partials       737      737           

[waldbauer-certat]

LGTM

[sebix]

Thanks.

The changelog entry is missing