docs: add pre-release to helm tracking strategies

[morey-tech]

Closes: #13921

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[codecov]

Codecov Report

Patch and project coverage have no change.

Comparison is base (99d8024) 49.56% compared to head (905e4b7) 49.56%.

Additional details and impacted files

@@           Coverage Diff           @@
##           master   #13923   +/-   ##
=======================================
  Coverage   49.56%   49.56%           
=======================================
  Files         256      256           
  Lines       43920    43920           
=======================================
  Hits        21770    21770           
  Misses      19987    19987           
  Partials     2163     2163           

see 1 file with indirect coverage changes

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[todaywasawesome]

Good grammar fix.

[pasha-codefresh]

LGTM, thank you