Update actions/cache action to v2.1.6

[renovate]

This PR contains the following updates:

Package	Type	Update	Change
actions/cache	action	patch	v2.1.5 -> v2.1.6

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Release Notes

actions/cache

v2.1.6

Compare Source

• Catch unhandled "bad file descriptor" errors that sometimes occurs when the cache server returns non-successful response (Catch and log unhandled exceptions stemming from closed file descriptor actions/cache#596)

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Configuration

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[codecov-commenter]

Codecov Report

Merging #35 (73d23cc) into main (2107cf8) will not change coverage.
The diff coverage is n/a.

@@          Coverage Diff          @@
##            main     #35   +/-   ##
=====================================
  Coverage   0.00%   0.00%           
=====================================
  Files          2       2           
  Lines        131     131           
=====================================
  Misses       131     131           

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