Update README.md

[ed-wright]

If you attempt to run the command safety check --output --json insecure_report.json given in the README it fails due to --output expecting a filename where --json is then given and insecure_report.json is now an unknown parameter. Running the --json flag first then --output with insecure_report.json allows the command to run correctly.

[codecov[bot]]

Codecov Report

Merging #358 (aa62574) into master (7d1448e) will not change coverage. The diff coverage is n/a.

@@           Coverage Diff           @@
##           master     #358   +/-   ##
=======================================
  Coverage   69.51%   69.51%           
=======================================
  Files           8        8           
  Lines         538      538           
=======================================
  Hits          374      374           
  Misses        164      164           

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[cclauss]

Git conflicts.

[yeisonvargasf]

Thank you. @ed-wright and @cclauss; this was an issue generated by the changes made in the 2.0 release; now, this issue doesn't exist.

I'll close this PR.