docs: fix parse-package usages flag

[lars-reimann]

Closes #1284.

Summary of Changes

• Change -s to -c

[lars-reimann]

🦙 MegaLinter status: ✅ SUCCESS

Descriptor	Linter	Files	Fixed	Errors	Elapsed time
✅ JSON	prettier	1	0	0	0.94s
✅ MARKDOWN	markdown-link-check	1		0	0.47s
✅ REPOSITORY	git_diff	yes		no	0.53s

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[codecov-commenter]

Codecov Report

Merging #1285 (7a1d003) into main (efcc522) will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##             main    #1285   +/-   ##
=======================================
  Coverage   66.43%   66.43%           
=======================================
  Files         168      168           
  Lines        7185     7185           
  Branches      594      594           
=======================================
  Hits         4773     4773           
  Misses       2143     2143           
  Partials      269      269           

Components	Coverage Δ
backend	81.66% <ø> (ø)
desktop	2.67% <ø> (ø)
gui	43.03% <ø> (ø)
package-parser	75.54% <ø> (ø)