Fix helm installation link

[shaun-nx]

Fixes link to helm installation configuration section.
Caught by @sigv in #3696

[codecov]

Codecov Report

Merging #3702 (b6ef13d) into release-3.1 (057c6d7) will decrease coverage by 0.04%.
The diff coverage is n/a.

@@               Coverage Diff               @@
##           release-3.1    #3702      +/-   ##
===============================================
- Coverage        52.36%   52.33%   -0.04%     
===============================================
  Files               59       59              
  Lines            16880    16880              
===============================================
- Hits              8840     8834       -6     
- Misses            7745     7749       +4     
- Partials           295      297       +2     

see 2 files with indirect coverage changes

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