testutil/mergepr: change label to merge now

[corverroos]

Github actions cannot be easily be triggered when all checks completed. So "merge when ready" is misleading. Change the label to trigger a merge attempt to "merge now". Since adding a label triggers the action and all checks should have passed at that point already.

category: refactor
ticket: #325

[codecov]

Codecov Report

Merging #357 (4bd2225) into main (fb5591c) will decrease coverage by 1.48%.
The diff coverage is 0.00%.

❗ Current head 4bd2225 differs from pull request most recent head a8e2efd. Consider uploading reports for the commit a8e2efd to get more accurate results

@@            Coverage Diff             @@
##             main     #357      +/-   ##
==========================================
- Coverage   55.68%   54.19%   -1.49%     
==========================================
  Files          62       63       +1     
  Lines        5332     5484     +152     
==========================================
+ Hits         2969     2972       +3     
- Misses       1962     2113     +151     
+ Partials      401      399       -2     

Impacted Files	Coverage Δ
testutil/mergepr/mergepr.go	0.00% <0.00%> (ø)
app/app.go	64.51% <0.00%> (+0.96%)	⬆️

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[dB2510]

Let's merge now!