build(deps): bump plbstl/first-contribution from 4.3.0 to 4.3.1

Bumps [plbstl/first-contribution](https://github.com/plbstl/first-contribution) from 4.3.0 to 4.3.1.
- [Release notes](https://github.com/plbstl/first-contribution/releases)
- [Commits](plbstl/first-contribution@7c31f41...5e84b16)

---
updated-dependencies:
- dependency-name: plbstl/first-contribution
  dependency-version: 4.3.1
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

Signed-off-by: dependabot[bot] <support@github.com>

Author: dependabot[bot]

.github/workflows/maintenance-welcome-issue.yml

@@ -14,7 +14,7 @@ jobs:
       issues: write
       pull-requests: write
     steps:
-      - uses: plbstl/first-contribution@7c31f41b0e7a70adfcae06cf964679f61af6780b # v4.3.0
+      - uses: plbstl/first-contribution@5e84b16ee0cef8f8a87cb7a2cf247b187c228879 # v4.3.1
         with:
           labels: "Good first issue"
           issue-opened-msg: |

.github/workflows/maintenance-welcome-pr.yml

@@ -14,7 +14,7 @@ jobs:
       issues: write
       pull-requests: write
     steps:
-      - uses: plbstl/first-contribution@7c31f41b0e7a70adfcae06cf964679f61af6780b # v4.3.0
+      - uses: plbstl/first-contribution@5e84b16ee0cef8f8a87cb7a2cf247b187c228879 # v4.3.1
         with:
           pr-opened-msg: |
             ### Hey @{fc-author}! 👋