Bump whoami from 1.4.1 to 1.5.1 in /backend (#1157)

Bumps [whoami](https://github.com/ardaku/whoami) from 1.4.1 to 1.5.1.
<details>
<summary>Changelog</summary>
<p><em>Sourced from <a
href="https://github.com/ardaku/whoami/blob/v1/CHANGELOG.md">whoami's
changelog</a>.</em></p>
<blockquote>
<h2>[1.5.1] - 2024-03-09</h2>
<h3>Fixed</h3>
<ul>
<li>Broken link in docs</li>
</ul>
<h2>[1.5.0] - 2024-03-03</h2>
<h3>Added</h3>
<ul>
<li>WASI support</li>
<li>Redox support</li>
<li>Fallible functions
<ul>
<li><code>whoami::fallible::devicename()</code></li>
<li><code>whoami::fallible::devicename_os()</code></li>
<li><code>whoami::fallible::distro()</code></li>
<li><code>whoami::fallible::hostname()</code> - notably doesn't
normalize to lowercase</li>
<li><code>whoami::fallible::realname()</code></li>
<li><code>whoami::fallible::realname_os()</code></li>
<li><code>whoami::fallible::username()</code></li>
<li><code>whoami::fallible::username_os()</code></li>
</ul>
</li>
<li><code>whoami::Language</code></li>
<li><code>whoami::Country</code></li>
<li><code>whoami::langs()</code></li>
<li><code>whoami::fallible::account()</code></li>
<li><code>whoami::fallible::account_os()</code></li>
<li><code>whoami::DesktopEnv::is_gtk()</code></li>
<li><code>whoami::DesktopEnv::is_kde()</code></li>
</ul>
<h3>Removed</h3>
<ul>
<li>Generated device names that infer casing based on the hostname when
the
device name is not available - now returns the hostname unchanged</li>
<li>Partial (potentially unsound) support for Android, iOS, watchOS,
tvOS,
Fuchsia, Haiku, Solaris, and a few others. These targets now use the
&quot;fake&quot;
implementation.</li>
</ul>
<h3>Changed</h3>
<ul>
<li>Deprecated <code>whoami::distro_os()</code></li>
<li>Deprecated <code>whoami::hostname()</code></li>
<li>Deprecated <code>whoami::hostname_os()</code></li>
<li>Deprecated <code>whoami::lang()</code></li>
<li>illumos and Redox are no longer untested targets</li>
<li>Documented that illumos and Redox have a higher MSRV (Rust 1.65)
than other
targets</li>
<li>Display implementation on <code>Platform::Illumos</code> now
displays in lowercase:
illumos</li>
</ul>
<h3>Fixed</h3>
<!-- raw HTML omitted -->
</blockquote>
<p>... (truncated)</p>
</details>
<details>
<summary>Commits</summary>
<ul>
<li><a
href="https://github.com/ardaku/whoami/commit/74a0c3b8b834d8f100dad20b266178fef40e0760"><code>74a0c3b</code></a>
Prepare to release whoami 1.5.1 (<a
href="https://redirect.github.com/ardaku/whoami/issues/109">#109</a>)</li>
<li><a
href="https://github.com/ardaku/whoami/commit/7789b3f9dd1bb869b50893c5fea798c00b4a1f9a"><code>7789b3f</code></a>
Backport v2 -&gt; v1: Test docs in CI (<a
href="https://redirect.github.com/ardaku/whoami/issues/108">#108</a>)</li>
<li><a
href="https://github.com/ardaku/whoami/commit/4bbaf5201b29d8d5f9f9917524020ad15ed88983"><code>4bbaf52</code></a>
Prevent future potential UB in unix wrapper for <code>getpwuid()</code>
(<a
href="https://redirect.github.com/ardaku/whoami/issues/104">#104</a>)</li>
<li><a
href="https://github.com/ardaku/whoami/commit/358dc0ef16960beafdf14f89198616b0f378b884"><code>358dc0e</code></a>
WhoAmI 1.5.0 Release (<a
href="https://redirect.github.com/ardaku/whoami/issues/94">#94</a>)</li>
<li><a
href="https://github.com/ardaku/whoami/commit/d6ee13ed9e818aa51b8d86d95e8009a376289a40"><code>d6ee13e</code></a>
Fix Instances of Memory Corruption on Illumos (<a
href="https://redirect.github.com/ardaku/whoami/issues/93">#93</a>)</li>
<li><a
href="https://github.com/ardaku/whoami/commit/953e702c0b24789a359a4027818af53bcb979db6"><code>953e702</code></a>
Support Redox (<a
href="https://redirect.github.com/ardaku/whoami/issues/92">#92</a>)</li>
<li><a
href="https://github.com/ardaku/whoami/commit/5bc73e4e6375a22e6b71300e0befc9cf4c97c278"><code>5bc73e4</code></a>
Preserve OS case for hostnames (<a
href="https://redirect.github.com/ardaku/whoami/issues/86">#86</a>)</li>
<li><a
href="https://github.com/ardaku/whoami/commit/29d5f2210339aa487073a3372876c0a498e46379"><code>29d5f22</code></a>
Support WASI (<a
href="https://redirect.github.com/ardaku/whoami/issues/84">#84</a>)</li>
<li><a
href="https://github.com/ardaku/whoami/commit/d7885e7c75d9a59ab3d2f5dceb82d46399c7dd7b"><code>d7885e7</code></a>
Add <code>Target</code> trait for implementing new targets (<a
href="https://redirect.github.com/ardaku/whoami/issues/80">#80</a>)</li>
<li><a
href="https://github.com/ardaku/whoami/commit/e3da4c56f9df876f01baea5e8fde6d1a0ac60ae9"><code>e3da4c5</code></a>
Add <code>langs()</code> function, deprecate <code>lang()</code> (<a
href="https://redirect.github.com/ardaku/whoami/issues/78">#78</a>)</li>
<li>Additional commits viewable in <a
href="https://github.com/ardaku/whoami/compare/v1.4.1...v1.5.1">compare
view</a></li>
</ul>
</details>
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