Bump external/fmt from `a3a74fa` to `e0d3e34`

[dependabot[bot]]

Bumps external/fmt from a3a74fa to e0d3e34.

Commits

• e0d3e34 Wrap Char in array to avoid pointer arithmetic (#3695)
• 19276d7 Fix an inconsistentcy between to_string and format
• 2a2c6e6 Fix flushing C++ iostreams before calling write_console() (#3689)
• 3b7f58a add buffer flush before direct write
• e9bbd40 Update README.rst
• 857cce7 Update README.rst
• 081d5b0 Update README.rst
• baae1ed add meson instructions to usage docs (#3677)
• 2ac6c5c Fix error C2668 on Windows with option /std:c++latest (#3680)
• d9063ba Fix perf regression in ostream::print
• Additional commits viewable in compare view

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[Idhrendur]

@dependabot squash and merge