Update ci.yml

Disable release for dependabot (fails due to https://docs.github.com/en/code-security/dependabot/working-with-dependabot/automating-dependabot-with-github-actions#responding-to-events)

Enable manual dispatch of the workflow

.github/workflows/ci.yml

@@ -5,6 +5,7 @@ on:
     branches-ignore:
       - dependabot/*
   pull_request:
+  workflow_dispatch:
 
 jobs:
   build:
@@ -39,7 +40,7 @@ jobs:
           name: unittests-${{ matrix.os }}
           fail_ci_if_error: true
   release:
-    if: github.ref == 'refs/heads/main' && !contains(github.event.head_commit.message, 'skip release')
+    if: github.ref == 'refs/heads/main' && !contains(github.event.head_commit.message, 'skip release') && github.actor != 'dependabot[bot]'
     needs: build
     runs-on: windows-latest
     env: