Pretty print stdout in examples

[cijothomas]

I tend to use this a lot, not sure if this we should make the default in examples to do this. This PR adds a comment about how to get pretty print easily.

[TommyCpp]

Looks good. Can merge it once we get the lint error out of the way

[codecov]

Codecov Report

Patch and project coverage have no change.

Comparison is base (2ba8f9f) 49.1% compared to head (d9b62f5) 49.2%.
Report is 1 commits behind head on main.

Additional details and impacted files

@@          Coverage Diff          @@
##            main   #1212   +/-   ##
=====================================
  Coverage   49.1%   49.2%           
=====================================
  Files        173     173           
  Lines      20937   20937           
=====================================
+ Hits       10301   10302    +1     
+ Misses     10636   10635    -1     

Files Changed	Coverage Δ
opentelemetry-sdk/src/runtime.rs	92.1% <ø> (ø)

... and 1 file with indirect coverage changes

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