refactor: update gitops engine version (issue #1816)

[wtam2018]

Checklist:

• Either (a) I've created an enhancement proposal and discussed it with the community, (b) this is a bug fix, or (c) this does not need to be in the release notes.
• The title of the PR states what changed and the related issues number (used for the release note).
• I've updated both the CLI and UI to expose my feature, or I plan to submit a second PR with them.
• Does this PR require documentation updates?
• I've updated documentation as required by this PR.
• Optional. My organization is added to USERS.md.
• I've signed the CLA and my build is green (troubleshooting builds).

Fixes: #1816

[codecov-io]

Codecov Report

Merging #4552 into master will decrease coverage by 0.10%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##           master    #4552      +/-   ##
==========================================
- Coverage   41.44%   41.34%   -0.11%     
==========================================
  Files         123      123              
  Lines       16809    16809              
==========================================
- Hits         6967     6949      -18     
- Misses       8837     8860      +23     
+ Partials     1005     1000       -5     

Impacted Files	Coverage Δ
controller/appcontroller.go	49.77% <0.00%> (-2.05%)	⬇️

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[alexmt]

LGTM