clang-tidy: use override

[neheb]

Found with modernize-use-override

Signed-off-by: Rosen Penev rosenp@gmail.com

[codecov]

Codecov Report

Merging #1710 (069c53d) into main (19000cd) will not change coverage.
The diff coverage is 97.22%.

@@           Coverage Diff           @@
##             main    #1710   +/-   ##
=======================================
  Coverage   66.89%   66.89%           
=======================================
  Files         151      151           
  Lines       20761    20761           
=======================================
  Hits        13889    13889           
  Misses       6872     6872           

Impacted Files	Coverage Δ
src/exiv2app.hpp	100.00% <ø> (ø)
src/makernote_int.hpp	91.66% <90.90%> (ø)
src/actions.hpp	100.00% <100.00%> (ø)
src/cr2header_int.hpp	50.00% <100.00%> (ø)
src/crwimage_int.hpp	84.37% <100.00%> (ø)
src/orfimage_int.hpp	100.00% <100.00%> (ø)
src/rw2image_int.hpp	100.00% <100.00%> (ø)
src/tiffcomposite_int.hpp	100.00% <100.00%> (ø)
src/tiffimage_int.hpp	85.71% <100.00%> (ø)
src/tiffvisitor_int.hpp	100.00% <100.00%> (ø)

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