Don't mark hash argument as required.

[kommendorkapten]

Summary

The hash hash argument a default value, which is documented. The mark required call broke this as it forces the caller to actually provide the hash algorithm

Release Note

• --hash argument to the timestamp-cli timestamp command is now optional as the documentation explains

Documentation

n/a

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Comparison is base (6fd19b0) 52.85% compared to head (7969f71) 54.85%.
Report is 16 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #644      +/-   ##
==========================================
+ Coverage   52.85%   54.85%   +1.99%     
==========================================
  Files          20       20              
  Lines        1209      948     -261     
==========================================
- Hits          639      520     -119     
+ Misses        509      367     -142     
  Partials       61       61              

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