chore(deps): update release-drafter/release-drafter action to v7 (#113)

* chore(deps): update release-drafter/release-drafter action to v7

* Remove v6 release-drafter config file

release-drafter v7 no longer uses .github/release-drafter.yml for
configuration; remove the now-unused file.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

---------

Co-authored-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>
Co-authored-by: Marcin Romaszewicz <marcinr@gmail.com>
Co-authored-by: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

Author: 3 people

.github/release-drafter.yml

@@ -16,7 +16,7 @@ jobs:
       pull-requests: write
     runs-on: ubuntu-latest
     steps:
-      - uses: release-drafter/release-drafter@b1476f6e6eb133afa41ed8589daba6dc69b4d3f5 # v6
+      - uses: release-drafter/release-drafter@139054aeaa9adc52ab36ddf67437541f039b88e2 # v7.1.1
         with:
           name: next
           tag: next