dockerfiles: bump Tor Browser version to 8.5.1 and fix broken lint target

[redshiftzero]

Status

Ready for review

Description of Changes

Fixes #4538
Fixes #4540

Testing

Does CI pass?

Deployment

Dev only

Checklist

If you made non-trivial code changes:

• I have written a test plan and validated it for this PR

[codecov-io]

Codecov Report

Merging #4539 into develop will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff            @@
##           develop    #4539   +/-   ##
========================================
  Coverage    82.53%   82.53%           
========================================
  Files           45       45           
  Lines         3121     3121           
  Branches       339      339           
========================================
  Hits          2576     2576           
  Misses         458      458           
  Partials        87       87

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[emkll]

CI is green, TLS recommendation URL lgtm.

Thanks @redshiftzero !