Fix archive signing step

[yurishkuro]

The release process fails because ./deploy/jaeger-$VERSION.asc file is empty. But we don't need that file.

Error: Validation Failed: {"resource":"ReleaseAsset","code":"custom","field":"size","message":"size must be greater than or equal to 1"}

[codecov]

Codecov Report

Base: 97.16% // Head: 97.16% // No change to project coverage 👍

Coverage data is based on head (05c6b99) compared to base (56e627c).
Patch has no changes to coverable lines.

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #4099   +/-   ##
=======================================
  Coverage   97.16%   97.16%           
=======================================
  Files         295      295           
  Lines       17413    17413           
=======================================
  Hits        16920    16920           
  Misses        397      397           
  Partials       96       96           

Flag	Coverage Δ
unittests	97.16% <ø> (ø)

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