Documenting limitation of managing action secrets out-of-bound

[willvedd]

🔧 Changes

As noted in #860, users are having issues managing their action secrets out-of-band through the ignore_changes block. However, this doesn't result in the expected behavior and secrets can still be deleted in the process. This PR updates the documentation very clear that secrets and dependencies cannot be managed out-of-band. In short, this is because the provider cannot discern between intentionally empty set of secrets and ignoring secrets by omission.

📚 References

Related Github Issue: #860 (comment)

🔬 Testing

N/A.

📝 Checklist

• All new/changed/fixed functionality is covered by tests (or N/A)
• I have added documentation for all new/changed functionality (or N/A)

[codecov-commenter]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 90.03%. Comparing base (d50bfd3) to head (dca0907).
Report is 83 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main     #898   +/-   ##
=======================================
  Coverage   90.03%   90.03%           
=======================================
  Files         101      101           
  Lines       13779    13779           
=======================================
  Hits        12406    12406           
  Misses        973      973           
  Partials      400      400           

Files with missing lines	Coverage Δ
internal/auth0/action/resource.go	87.30% <100.00%> (ø)