ci: treat failures in cleanup tasks for pr-windows-signed-scripts.yaml as warmings not errors

[marosset]

Signed-off-by: Mark Rossetti marosset@microsoft.com

Reason for Change:

Issue Fixed:

Credit Where Due:

Does this change contain code from or inspired by another project?

• No
• Yes

If "Yes," did you notify that project's maintainers and provide attribution?

• No
• Yes

Requirements:

• uses conventional commit messages
• includes documentation
• adds unit tests
• tested upgrade from previous version

Notes:

[jsturtevant]

Thanks for fixing that!

/lgtm

[acs-bot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: jsturtevant, marosset

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[codecov]

Codecov Report

Merging #4384 (9e14b97) into master (60828c7) will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##           master    #4384   +/-   ##
=======================================
  Coverage   72.04%   72.04%           
=======================================
  Files         141      141           
  Lines       21631    21631           
=======================================
  Hits        15584    15584           
  Misses       5096     5096           
  Partials      951      951           

Impacted Files	Coverage Δ
pkg/api/common/versions.go	96.37% <ø> (ø)
pkg/engine/templates_generated.go	43.31% <ø> (ø)

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