Update dependency k6io/k6 to v0.38.3

This MR contains the following updates:

Package	Type	Update	Change
k6io/k6	ironbank-github	patch	v0.38.2 -> v0.38.3
k6io/k6		patch	v0.38.2 -> v0.38.3

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Release Notes

k6io/k6

v0.38.3

Compare Source

k6 v0.38.3 is a patch release containing a single fix

Threshold over already defined sub-metrics will result in an error (#​2538)

There was a bug where we were checking if a submetric had already been added. Unfortunately, we didn't check that this will work with the one submetric we have by default http_req_duration{expected_response:true}. After v0.38.0 defining a threshold on it would result in an error.

As this definitely shouldn't happen in that case and we don't see a particular case where that will be problematic - adding a submetric again just reuses the already added one instead.

This issue has been addressed in #​2539, and k6 v0.38.3 will now lead you add a threshold on http_req_duration{expected_response:true}.

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