chore(deps): bump mattermost/action-mattermost-notify from 1.1.0 to 2.0.0 (#835)

Bumps
[mattermost/action-mattermost-notify](https://github.com/mattermost/action-mattermost-notify)
from 1.1.0 to 2.0.0.
<details>
<summary>Release notes</summary>
<p><em>Sourced from <a
href="https://github.com/mattermost/action-mattermost-notify/releases">mattermost/action-mattermost-notify's
releases</a>.</em></p>
<blockquote>
<h2>v2.0.0</h2>
<h2>What's Changed</h2>
<ul>
<li>feat: Migrate action to native js by <a
href="https://github.com/toninis"><code>@​toninis</code></a> in <a
href="https://redirect.github.com/mattermost/action-mattermost-notify/pull/13">mattermost/action-mattermost-notify#13</a></li>
</ul>
<h2>New Contributors</h2>
<ul>
<li><a href="https://github.com/toninis"><code>@​toninis</code></a> made
their first contribution in <a
href="https://redirect.github.com/mattermost/action-mattermost-notify/pull/13">mattermost/action-mattermost-notify#13</a></li>
</ul>
<p><strong>Full Changelog</strong>: <a
href="https://github.com/mattermost/action-mattermost-notify/compare/1.1.0...2.0.0">https://github.com/mattermost/action-mattermost-notify/compare/1.1.0...2.0.0</a></p>
</blockquote>
</details>
<details>
<summary>Commits</summary>
<ul>
<li><a
href="https://github.com/mattermost/action-mattermost-notify/commit/b7d118e440bf2749cd18a4a8c88e7092e696257a"><code>b7d118e</code></a>
feat: Migrate action to native js (<a
href="https://redirect.github.com/mattermost/action-mattermost-notify/issues/13">#13</a>)</li>
<li>See full diff in <a
href="https://github.com/mattermost/action-mattermost-notify/compare/1.1.0...2.0.0">compare
view</a></li>
</ul>
</details>
<br />


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.github/workflows/mattermost.yml

@@ -14,6 +14,6 @@ jobs:
         run: >
           jq -n --arg t "Pull request opened: [${TITLE}](${HTML_LINK})" '{text: $t}'
           > mattermost.json
-      - uses: mattermost/action-mattermost-notify@1.1.0
+      - uses: mattermost/action-mattermost-notify@2.0.0
         env:
           MATTERMOST_WEBHOOK_URL: ${{ secrets.MATTERMOST_WEBHOOK_URL }}