Remove scanning of example JARs in the release workflow to avoid Trivy failure

[aneeshafedo]

Description

$subject

Type of change

Please delete options that are not relevant.

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)
• This change requires a documentation update

Checklist:

Security checks

• Followed secure coding standards in http://wso2.com/technical-reports/wso2-secure-engineering-guidelines?
• Confirmed that this PR doesn't commit any keys, passwords, tokens, usernames, or other secrets?

[codecov]

Codecov Report

All modified lines are covered by tests ✅

Comparison is base (5565edd) 81.14% compared to head (371045c) 81.14%.

Additional details and impacted files

@@           Coverage Diff           @@
##           master     #227   +/-   ##
=======================================
  Coverage   81.14%   81.14%           
=======================================
  Files           5        5           
  Lines         175      175           
  Branches       78       78           
=======================================
  Hits          142      142           
  Misses         33       33           

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