drop codecov patch threshold to 40%

[nkubala]

this should help a bit with flakes

[codecov]

Codecov Report

Merging #4716 into master will increase coverage by 0.03%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##           master    #4716      +/-   ##
==========================================
+ Coverage   73.34%   73.38%   +0.03%     
==========================================
  Files         338      341       +3     
  Lines       13394    13505     +111     
==========================================
+ Hits         9824     9910      +86     
- Misses       2962     2976      +14     
- Partials      608      619      +11     

Impacted Files	Coverage Δ
pkg/skaffold/build/gcb/docker.go	81.81% <0.00%> (-4.85%)	⬇️
pkg/skaffold/deploy/kpt.go	85.32% <0.00%> (-3.09%)	⬇️
pkg/skaffold/build/cache/hash.go	73.23% <0.00%> (-2.71%)	⬇️
pkg/skaffold/build/local/docker.go	78.18% <0.00%> (-2.59%)	⬇️
pkg/skaffold/docker/image.go	73.36% <0.00%> (-1.86%)	⬇️
pkg/skaffold/runner/runcontext/context.go	84.61% <0.00%> (-1.47%)	⬇️
pkg/skaffold/build/buildpacks/lifecycle.go	81.57% <0.00%> (-1.14%)	⬇️
pkg/skaffold/docker/parse.go	89.94% <0.00%> (-0.43%)	⬇️
pkg/skaffold/config/options.go	100.00% <0.00%> (ø)
pkg/skaffold/runner/debugging.go	75.00% <0.00%> (ø)
... and 6 more

---

Continue to review full report at Codecov.

Legend - Click here to learn more
Δ = absolute <relative> (impact), ø = not affected, ? = missing data
Powered by Codecov. Last update 708519b...a4f4c80. Read the comment docs.