Fix Apache license copyright placeholder

[ldemailly]

The Apache License template still contains the unfilled copyright
placeholder:

   Copyright [yyyy] [name of copyright owner]

This PR replaces it with the correct copyright information.

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 40.31%. Comparing base (e876282) to head (088607b).
⚠️ Report is 1 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main      #43   +/-   ##
=======================================
  Coverage   40.31%   40.31%           
=======================================
  Files           8        8           
  Lines         697      697           
=======================================
  Hits          281      281           
  Misses        372      372           
  Partials       44       44           

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