Fix examples to use from_yaml filter with lookup

[geerlingguy]

See #49.

[codecov]

Codecov Report

Merging #56 into master will not change coverage by %.
The diff coverage is n/a.

@@           Coverage Diff           @@
##           master      #56   +/-   ##
=======================================
  Coverage   43.28%   43.28%           
=======================================
  Files           3        3           
  Lines         536      536           
  Branches      109      109           
=======================================
  Hits          232      232           
  Misses        261      261           
  Partials       43       43           

Impacted Files	Coverage Δ
plugins/modules/k8s.py	90.90% <ø> (ø)

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