chore(deps): Bump rust_decimal from 1.38.0 to 1.39.0 (apache#1761)

Bumps [rust_decimal](https://github.com/paupino/rust-decimal) from
1.38.0 to 1.39.0.
<details>
<summary>Release notes</summary>
<p><em>Sourced from <a
href="https://github.com/paupino/rust-decimal/releases">rust_decimal's
releases</a>.</em></p>
<blockquote>
<h2>1.39.0</h2>
<h2>What's Changed</h2>
<ul>
<li>v1 <code>postgres</code> -&gt; <code>postgres_backend</code> by <a
href="https://github.com/Logarithmus"><code>@​Logarithmus</code></a> in
<a
href="https://redirect.github.com/paupino/rust-decimal/pull/751">paupino/rust-decimal#751</a></li>
<li>Remove doc_auto_cfg and address lifetime warnings by <a
href="https://github.com/paupino"><code>@​paupino</code></a> in <a
href="https://redirect.github.com/paupino/rust-decimal/pull/755">paupino/rust-decimal#755</a></li>
<li>Version 1.39.0 by <a
href="https://github.com/paupino"><code>@​paupino</code></a> in <a
href="https://redirect.github.com/paupino/rust-decimal/pull/756">paupino/rust-decimal#756</a></li>
</ul>
<h2>New Contributors</h2>
<ul>
<li><a
href="https://github.com/Logarithmus"><code>@​Logarithmus</code></a>
made their first contribution in <a
href="https://redirect.github.com/paupino/rust-decimal/pull/751">paupino/rust-decimal#751</a></li>
</ul>
<p><strong>Full Changelog</strong>: <a
href="https://github.com/paupino/rust-decimal/compare/1.38.0...1.39.0">https://github.com/paupino/rust-decimal/compare/1.38.0...1.39.0</a></p>
</blockquote>
</details>
<details>
<summary>Commits</summary>
<ul>
<li><a
href="https://github.com/paupino/rust-decimal/commit/a028cf43fe1c383cc6927ed2dbd4b6aac443e99c"><code>a028cf4</code></a>
Version 1.39.0 (<a
href="https://redirect.github.com/paupino/rust-decimal/issues/756">#756</a>)</li>
<li><a
href="https://github.com/paupino/rust-decimal/commit/c52f1f12931dcd21956189e3f48e8baedb7e3f31"><code>c52f1f1</code></a>
Remove doc_auto_cfg and address lifetime warnings (<a
href="https://redirect.github.com/paupino/rust-decimal/issues/755">#755</a>)</li>
<li><a
href="https://github.com/paupino/rust-decimal/commit/4bf40bd105edec473e1a19e9a0a83c16615786d0"><code>4bf40bd</code></a>
Merge pull request <a
href="https://redirect.github.com/paupino/rust-decimal/issues/751">#751</a>
from Logarithmus/postgres-backend</li>
<li><a
href="https://github.com/paupino/rust-decimal/commit/9da94d0be903d4c7a4a6f3f7c2aeb6713fcfcd70"><code>9da94d0</code></a>
<code>postgres</code> -&gt; <code>postgres_backend</code></li>
<li>See full diff in <a
href="https://github.com/paupino/rust-decimal/compare/1.38.0...1.39.0">compare
view</a></li>
</ul>
</details>
<br />


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Signed-off-by: dependabot[bot] <[email protected]>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>
Co-authored-by: Renjie Liu <[email protected]>

Author: dependabot[bot]