Rename register.yml to Register.yml

[rikhuijzer]

All other files in templates/github/workflows/ start with a capital letter too

[codecov]

Codecov Report

Merging #336 (ba2a851) into master (015dfc4) will increase coverage by 0.14%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##           master     #336      +/-   ##
==========================================
+ Coverage   94.62%   94.76%   +0.14%     
==========================================
  Files          20       20              
  Lines         632      630       -2     
==========================================
- Hits          598      597       -1     
+ Misses         34       33       -1     

Impacted Files	Coverage Δ
src/plugins/register.jl	100.00% <ø> (ø)
src/template.jl	98.42% <0.00%> (-0.02%)	⬇️
src/plugins/git.jl	95.08% <0.00%> (+1.53%)	⬆️

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[codecov]

Codecov Report

Merging #336 (21aaf74) into master (774f9fd) will decrease coverage by 0.22%.
Report is 11 commits behind head on master.
The diff coverage is n/a.

@@            Coverage Diff             @@
##           master     #336      +/-   ##
==========================================
- Coverage   93.12%   92.91%   -0.22%     
==========================================
  Files          23       23              
  Lines         713      734      +21     
==========================================
+ Hits          664      682      +18     
- Misses         49       52       +3     

Files	Coverage Δ
src/plugins/register.jl	100.00% <ø> (ø)

... and 2 files with indirect coverage changes

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