[projmgr] Fix list configs mandatory argument

[spcaipers-arm]

Address Open-CMSIS-Pack/cmsis-toolbox#188

[github-actions]

Test Results

    3 files     18 suites   8m 48s ⏱️
  377 tests   377 ✅ 0 💤 0 ❌
1 131 runs  1 131 ✅ 0 💤 0 ❌

Results for commit f768dc0.

[codecov]

Codecov Report

Attention: Patch coverage is 80.00000% with 2 lines in your changes missing coverage. Please review.

Project coverage is 64.98%. Comparing base (28264fc) to head (f768dc0).
Report is 2 commits behind head on main.

Files with missing lines	Patch %	Lines
tools/projmgr/test/src/ProjMgrUnitTests.cpp	75.00%	0 Missing and 2 partials ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #1878      +/-   ##
==========================================
+ Coverage   64.96%   64.98%   +0.02%     
==========================================
  Files         163      163              
  Lines       34566    34573       +7     
  Branches    20054    20057       +3     
==========================================
+ Hits        22455    22468      +13     
+ Misses       7956     7952       -4     
+ Partials     4155     4153       -2     

Flag	Coverage Δ
projmgr-cov	81.76% <80.00%> (+0.05%)	⬆️

Flags with carried forward coverage won't be shown. Click here to find out more.

Files with missing lines	Coverage Δ
tools/projmgr/src/ProjMgr.cpp	82.35% <100.00%> (+1.20%)	⬆️
tools/projmgr/test/src/ProjMgrUnitTests.cpp	80.98% <75.00%> (-0.02%)	⬇️