ci: print clang-format version for reproducibility

[matz-e]

No description provided.

[codecov-commenter]

Codecov Report

❗ No coverage uploaded for pull request base (master@f3ce0be). Click here to learn what that means.
The diff coverage is n/a.

@@            Coverage Diff            @@
##             master     #588   +/-   ##
=========================================
  Coverage          ?   80.57%           
=========================================
  Files             ?       66           
  Lines             ?     3572           
  Branches          ?        0           
=========================================
  Hits              ?     2878           
  Misses            ?      694           
  Partials          ?        0           

---

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 f3ce0be...11fb0aa. Read the comment docs.