DM-35775: Fix log message formatting when failing to find translation class

[timj]

No description provided.

[codecov]

Codecov Report

Merging #62 (07d3b90) into main (f31394f) will increase coverage by 0.01%.
The diff coverage is 100.00%.

@@            Coverage Diff             @@
##             main      #62      +/-   ##
==========================================
+ Coverage   78.52%   78.53%   +0.01%     
==========================================
  Files          36       36              
  Lines        3101     3103       +2     
  Branches      549      550       +1     
==========================================
+ Hits         2435     2437       +2     
  Misses        544      544              
  Partials      122      122              

Impacted Files	Coverage Δ
python/astro_metadata_translator/headers.py	93.58% <ø> (ø)
tests/test_indexing.py	98.42% <100.00%> (+0.02%)	⬆️

---

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 f31394f...07d3b90. Read the comment docs.