Longtable page number fix for pkg reproducibility table

[slager]

Description

Fix for repeat headers from package reproducibility table causing page numbering like "11/10".

Related Issues

#329
FredHutch/VISCfunctions#132

See also:

#270
#277

Checklist

• This PR includes unit tests
• This PR establishes a new function or updates parameters in an existing function
  • The roxygen skeleton for this function has been updated using devtools::document
• I have updated NEWS.md to describe the proposed changes

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 85.14%. Comparing base (1aa971e) to head (0a8f902).
⚠️ Report is 3 commits behind head on develop.

Additional details and impacted files

@@           Coverage Diff            @@
##           develop     #332   +/-   ##
========================================
  Coverage    85.14%   85.14%           
========================================
  Files           10       10           
  Lines          377      377           
========================================
  Hits           321      321           
  Misses          56       56           

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