Renovate: group requirements.txt updates

[hugovk]

To group the second and third PRs in a single PR, like the first one:

[codecov]

Codecov Report

Merging #344 (83c4c0e) into main (c32877b) will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##             main     #344   +/-   ##
=======================================
  Coverage   99.48%   99.48%           
=======================================
  Files           8        8           
  Lines         777      777           
=======================================
  Hits          773      773           
  Misses          4        4           

Flag	Coverage Δ
macos-latest	99.48% <ø> (ø)
ubuntu-latest	99.48% <ø> (ø)
windows-latest	99.48% <ø> (ø)

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

---

Continue to review full report at Codecov.

Legend - Click here to learn more
Δ = absolute <relative> (impact), ø = not affected, ? = missing data
Powered by Codecov. Last update c32877b...83c4c0e. Read the comment docs.