Fix Docker command

[willarmiros]

Documentation: The path to the docker config no longer exists, this change updates it to the correct one: https://github.com/aws-observability/aws-otel-collector/blob/main/examples/docker/config-test.yaml

[codecov-commenter]

Codecov Report

Merging #515 (4dbab37) into main (7f9ec40) will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##             main     #515   +/-   ##
=======================================
  Coverage   82.60%   82.60%           
=======================================
  Files           6        6           
  Lines         115      115           
=======================================
  Hits           95       95           
  Misses         11       11           
  Partials        9        9           

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[mxiamxia]

Thanks!