docs: mention hooks don't run on cached artifacts

[ahmetb]

Fixes: #6572
Related: #6572

[container-tools-bot]

Please visit http://34.94.177.206:1313 to view changes to the docs.

[codecov]

Codecov Report

Merging #6577 (b831f6d) into main (290280e) will decrease coverage by 0.06%.
The diff coverage is 34.69%.

@@            Coverage Diff             @@
##             main    #6577      +/-   ##
==========================================
- Coverage   70.48%   70.41%   -0.07%     
==========================================
  Files         515      517       +2     
  Lines       23150    23268     +118     
==========================================
+ Hits        16317    16384      +67     
- Misses       5776     5822      +46     
- Partials     1057     1062       +5     

Impacted Files	Coverage Δ
cmd/skaffold/app/cmd/cmd.go	70.68% <0.00%> (-0.38%)	⬇️
cmd/skaffold/app/cmd/flags.go	90.81% <ø> (ø)
cmd/skaffold/skaffold.go	0.00% <ø> (ø)
pkg/skaffold/build/buildpacks/logger.go	0.00% <ø> (ø)
pkg/skaffold/config/options.go	100.00% <ø> (ø)
pkg/skaffold/docker/logger/log.go	22.64% <0.00%> (-0.44%)	⬇️
pkg/skaffold/schema/latest/v1/config.go	62.16% <ø> (ø)
pkg/skaffold/schema/v2beta21/upgrade.go	100.00% <ø> (ø)
pkg/skaffold/schema/versions.go	85.51% <ø> (ø)
pkg/skaffold/server/server.go	46.87% <0.00%> (-0.75%)	⬇️
... and 30 more

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[container-tools-bot]

Please visit http://35.236.30.3:1313 to view changes to the docs.