Bumps [actions/labeler](https://github.com/actions/labeler) from 3 to 4.
<details>
<summary>Release notes</summary>
<p><em>Sourced from <a href="https://github.com/actions/labeler/releases">actions/labeler's releases</a>.</em></p>
<blockquote>
<h2>v4.0.0</h2>
<ul>
<li><a href="https://github-redirect.dependabot.com/actions/labeler/pull/319"> Update to node 16 runtime</a></li>
</ul>
<h2>v3.1.0</h2>
<p>Dependency upgrades, docs updates, and behind-the-scenes maintenance.</p>
<p>See the full list of changes since 3.0.2 here: <a href="https://github.com/actions/labeler/compare/v3.0.2...v3.1.0">https://github.com/actions/labeler/compare/v3.0.2...v3.1.0</a></p>
<p>Thanks to <a href="https://github.com/GisoBartels"><code>@GisoBartels</code></a> and <a href="https://github.com/Muhammed-Rahif"><code>@Muhammed-Rahif</code></a> for their contributions!</p>
<h2>v3.0.2</h2>
<p>No API changes, but lots of behind-the-scenes upgrades, mostly to internal dependencies, tooling, and surrounding infrastructure.</p>
<h2>v3.0.1</h2>
<p>No user-facing changes.</p>
<p>That said, there were more than enough behind-the-scenes changes to warrant a new release: <a href="https://github.com/actions/labeler/compare/v3.0.0...v3.0.1">https://github.com/actions/labeler/compare/v3.0.0...v3.0.1</a></p>
</blockquote>
</details>
<details>
<summary>Commits</summary>
<ul>
<li><a href="9fd24f1f9d"><code>9fd24f1</code></a> Merge pull request <a href="https://github-redirect.dependabot.com/actions/labeler/issues/334">#334</a> from actions/thboop/updatetov4</li>
<li><a href="abae52fa24"><code>abae52f</code></a> Update to new v4 release</li>
<li><a href="e1132f5ed5"><code>e1132f5</code></a> Merge pull request <a href="https://github-redirect.dependabot.com/actions/labeler/issues/319">#319</a> from actions/thboop/node16update</li>
<li><a href="b0cc574b25"><code>b0cc574</code></a> Update build_test.yml</li>
<li><a href="c48e531900"><code>c48e531</code></a> Update default runtime to node16</li>
<li>See full diff in <a href="https://github.com/actions/labeler/compare/v3...v4">compare view</a></li>
</ul>
</details>
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<details>
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</details>
# Objective
- All new PRs should get the "S-Needs-Triage" label. But at the moment we for example are getting quite a few PRs to the new renderer branch that do not get the label.
## Solution
- Remove the required target "main" from the workflow
- Also removed configuration for not needed functionality of the labeler action (see [docs](https://github.com/actions/labeler#inputs))
# Objective
- the PR labeler workflow will always add the `needs-traige` label to every pull request event
## Solution
- Limit this workflow to only be on the `opened` event
# Objective
- Currently only issues automatically have labels assigned to them on creation.
- The enables pull requests to have the same functionality and currently only adds the `needs-triage` label to all PRs.
## Solution
- Integrate `actions/labeler@v2` into the github workflows to automatically tag PRs.
- Add a `label-config.yml` file that specifies how PRs should be labeled.
