chore: exp value fix in JWT payload

[sanderPostma]

No description provided.

[codecov]

Codecov Report

Attention: Patch coverage is 0% with 1 line in your changes missing coverage. Please review.

Project coverage is 49.11%. Comparing base (403debf) to head (086f910).
Report is 3 commits behind head on develop.

Files with missing lines	Patch %	Lines
packages/oid4vci-common/lib/functions/ProofUtil.ts	0.00%	1 Missing ⚠️

Additional details and impacted files

@@           Coverage Diff            @@
##           develop     #167   +/-   ##
========================================
  Coverage    49.11%   49.11%           
========================================
  Files           74       74           
  Lines         4976     4976           
  Branches      1731     1731           
========================================
  Hits          2444     2444           
  Misses        2529     2529           
  Partials         3        3           

Flag	Coverage Δ
unittest	49.11% <0.00%> (ø)

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