docs: update skaffold development guide to include information about commit messages

[MarlonGamez]

Description
This PR adds a bullet point to DEVELOPMENT.md to tell the developer that they should follow conventional commits guidelines.

[codecov]

Codecov Report

Merging #6670 (f0daa9d) into main (290280e) will decrease coverage by 0.69%.
The diff coverage is 50.00%.

@@            Coverage Diff             @@
##             main    #6670      +/-   ##
==========================================
- Coverage   70.48%   69.78%   -0.70%     
==========================================
  Files         515      523       +8     
  Lines       23150    23833     +683     
==========================================
+ Hits        16317    16633     +316     
- Misses       5776     6113     +337     
- Partials     1057     1087      +30     

Impacted Files	Coverage Δ
cmd/skaffold/app/cmd/flags.go	89.00% <0.00%> (-1.82%)	⬇️
cmd/skaffold/skaffold.go	0.00% <ø> (ø)
pkg/diag/recommender/container_errors.go	0.00% <0.00%> (ø)
pkg/diag/validator/pod.go	1.32% <0.00%> (ø)
pkg/skaffold/build/buildpacks/logger.go	0.00% <ø> (ø)
pkg/skaffold/build/cluster/logs.go	0.00% <ø> (-16.67%)	⬇️
cmd/skaffold/app/cmd/cmd.go	70.32% <66.66%> (-0.73%)	⬇️
pkg/diag/validator/resource.go	47.05% <66.66%> (ø)
pkg/skaffold/build/docker/docker.go	86.44% <66.66%> (-2.85%)	⬇️
pkg/skaffold/build/docker/errors.go	63.33% <80.00%> (-2.23%)	⬇️
... and 84 more

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