chore(ci): fix manual release dispatch - remove unsupported release-type input

The conventional-changelog-action does not support a release-type input;
version bump is derived from commits. Keeping only skip-on-empty conditional
so a manual dispatch forces a patch release even with an empty changelog.

Co-Authored-By: Claude Sonnet 4.6 <[email protected]>

Author: jeboehm

.github/workflows/release.yml

@@ -4,16 +4,6 @@ on:
     branches:
       - main
   workflow_dispatch:
-    inputs:
-      release_type:
-        description: "Release type to force (patch, minor, major)"
-        required: false
-        default: "patch"
-        type: choice
-        options:
-          - patch
-          - minor
-          - major
 concurrency:
   group: "${{ github.workflow }}-${{ github.ref }}"
   cancel-in-progress: true
@@ -32,7 +22,6 @@ jobs:
         with:
           github-token: ${{ secrets.GH_RELEASE_PAT }}
           skip-on-empty: ${{ github.event_name != 'workflow_dispatch' }}
-          release-type: ${{ github.event.inputs.release_type || 'patch' }}
           git-push: false
           skip-git-pull: true
           skip-version-file: true