fix: formatting of log messages

[huyinhou]

Argocd application controller 2.8 outputs logs like this:

time="2023-09-19T10:49:45Z" level=info msg="warning loading openapi schema: %s" server="https://172.18.1.1:6443"

[sonarcloud]

Kudos, SonarCloud Quality Gate passed!   

0 Bugs
0 Vulnerabilities
0 Security Hotspots
0 Code Smells

No Coverage information
0.0% Duplication

[codecov]

Codecov Report

Patch and project coverage have no change.

Comparison is base (b0fffe4) 54.61% compared to head (4fef8f9) 54.61%.

Additional details and impacted files

@@           Coverage Diff           @@
##           master     #540   +/-   ##
=======================================
  Coverage   54.61%   54.61%           
=======================================
  Files          41       41           
  Lines        4640     4640           
=======================================
  Hits         2534     2534           
  Misses       1910     1910           
  Partials      196      196           

Files Changed	Coverage Δ
pkg/cache/cluster.go	49.34% <0.00%> (ø)

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