Bump extern/fmt from 2d839bb to 95ba443 (#1556)

Bumps [extern/fmt](https://github.com/fmtlib/fmt) from `2d839bb` to
`95ba443`.
<details>
<summary>Commits</summary>
<ul>
<li><a
href="https://github.com/fmtlib/fmt/commit/95ba44311c8c05dcea093d218793afd3f19e1c6e"><code>95ba443</code></a>
Add funding configuration for GitHub</li>
<li><a
href="https://github.com/fmtlib/fmt/commit/605dd2a1d99c78e2d7f9662beab60c4a25af6941"><code>605dd2a</code></a>
Make digits2_i noexcept to match digits2 function (<a
href="https://redirect.github.com/fmtlib/fmt/issues/4639">#4639</a>)</li>
<li><a
href="https://github.com/fmtlib/fmt/commit/7ad8004d575a7eb5aed7b5911c1ae298f7258052"><code>7ad8004</code></a>
Speed up do_format_decimal (<a
href="https://redirect.github.com/fmtlib/fmt/issues/4630">#4630</a>)</li>
<li><a
href="https://github.com/fmtlib/fmt/commit/91d1aced0a846161135310249664506b4a56e196"><code>91d1ace</code></a>
Split exception into a separate file not to confuse openssf</li>
<li><a
href="https://github.com/fmtlib/fmt/commit/2e819a11f2bbe86a9b32a8c0c3b2c17df494d9b9"><code>2e819a1</code></a>
Some documentation improvements (<a
href="https://redirect.github.com/fmtlib/fmt/issues/4631">#4631</a>)</li>
<li><a
href="https://github.com/fmtlib/fmt/commit/7bce22571a49ba7921174effefbfbf24300667a6"><code>7bce225</code></a>
Make it work on newer mkdocstrings, fix deprecation warnings (<a
href="https://redirect.github.com/fmtlib/fmt/issues/4626">#4626</a>)</li>
<li><a
href="https://github.com/fmtlib/fmt/commit/ec73fb72477d80926c758894a3ab2cb3994fd051"><code>ec73fb7</code></a>
Cleanup gtest cmake config</li>
<li><a
href="https://github.com/fmtlib/fmt/commit/3269c1cea53cb84ab971b36486627367cf73cadc"><code>3269c1c</code></a>
Minor improvement to digits2</li>
<li><a
href="https://github.com/fmtlib/fmt/commit/789aa69e0a09d6b005ee8b2ae5ddd249daffe5ce"><code>789aa69</code></a>
fix: add missing operator (<a
href="https://redirect.github.com/fmtlib/fmt/issues/4627">#4627</a>)</li>
<li><a
href="https://github.com/fmtlib/fmt/commit/2a50a0d8081cdc2f591a96648d6fbf0275a6e7c6"><code>2a50a0d</code></a>
Remove unused symbol check (<a
href="https://redirect.github.com/fmtlib/fmt/issues/4625">#4625</a>)</li>
<li>Additional commits viewable in <a
href="https://github.com/fmtlib/fmt/compare/2d839bbc61659d8a464bdcd2717b577f03991d94...95ba44311c8c05dcea093d218793afd3f19e1c6e">compare
view</a></li>
</ul>
</details>
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