tools(deps-dev): Update vimeo/psalm requirement from 6.9.4 to 6.9.6 in /tools/psalm (#545)

Updates the requirements on
[vimeo/psalm](https://github.com/vimeo/psalm) to permit the latest
version.
<details>
<summary>Release notes</summary>
<p><em>Sourced from <a
href="https://github.com/vimeo/psalm/releases">vimeo/psalm's
releases</a>.</em></p>
<blockquote>
<h2>6.9.6</h2>
<!-- raw HTML omitted -->
<p>Add git, ssh and composer to the docker image by <a
href="https://github.com/danog"><code>@​danog</code></a>.</p>
<p><strong>Full Changelog</strong>: <a
href="https://github.com/vimeo/psalm/compare/6.9.5...6.9.6">https://github.com/vimeo/psalm/compare/6.9.5...6.9.6</a></p>
</blockquote>
</details>
<details>
<summary>Commits</summary>
<ul>
<li><a
href="https://github.com/vimeo/psalm/commit/61488aa2849793acfb72411829d114b4aa670941"><code>61488aa</code></a>
Invalidate even more caches</li>
<li><a
href="https://github.com/vimeo/psalm/commit/74feb33bf0c8b7c91843ef3343b6c3711b52064d"><code>74feb33</code></a>
Small improvement</li>
<li><a
href="https://github.com/vimeo/psalm/commit/f784344d225496e22b3cf70d691343d17d24f34b"><code>f784344</code></a>
Fix</li>
<li><a
href="https://github.com/vimeo/psalm/commit/c833c4e15e37ecd7cd6e1537f2f89017c8af0dfe"><code>c833c4e</code></a>
Add openssh to image</li>
<li><a
href="https://github.com/vimeo/psalm/commit/b9989c566097cd8a1cdc0378977938c8deb90545"><code>b9989c5</code></a>
Add commit</li>
<li><a
href="https://github.com/vimeo/psalm/commit/6c72a7fbb8a15356eb02bcf67e2454d52c45ceda"><code>6c72a7f</code></a>
Improve docker image</li>
<li><a
href="https://github.com/vimeo/psalm/commit/cbd421fa4eb6a9417914e4ded364673c4c70b1d0"><code>cbd421f</code></a>
Fix some JIT issues by switching to upstream</li>
<li><a
href="https://github.com/vimeo/psalm/commit/2bd70dba926464af2ff77bb69d5465a1c09901ef"><code>2bd70db</code></a>
Fixes</li>
<li><a
href="https://github.com/vimeo/psalm/commit/66b9c8b8f563994215f4293f0f387b29ef9d84bc"><code>66b9c8b</code></a>
Regen stubs</li>
<li><a
href="https://github.com/vimeo/psalm/commit/de0aa72512cda8a1c87f2fad0bc1d18e5c62d4dc"><code>de0aa72</code></a>
Ignore platform during stub generation (emulation is acceptable in this
usecase)</li>
<li>Additional commits viewable in <a
href="https://github.com/vimeo/psalm/compare/6.9.4...6.9.6">compare
view</a></li>
</ul>
</details>
<br />

<details>
<summary>Most Recent Ignore Conditions Applied to This Pull
Request</summary>

| Dependency Name | Ignore Conditions |
| --- | --- |
| vimeo/psalm | [>= 5.a, < 6] |
</details>


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</details>

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

Author: dependabot[bot]

tools/psalm/composer.json

@@ -7,7 +7,7 @@
     },
     "require-dev": {
         "roave/security-advisories": "dev-latest",
-        "vimeo/psalm": "6.9.4"
+        "vimeo/psalm": "6.9.6"
     },
     "prefer-stable": true,
     "config": {