Bump nf-core/setup-nextflow from 1 to 2

Bumps [nf-core/setup-nextflow](https://github.com/nf-core/setup-nextflow) from 1 to 2.
- [Release notes](https://github.com/nf-core/setup-nextflow/releases)
- [Changelog](https://github.com/nf-core/setup-nextflow/blob/master/CHANGELOG.md)
- [Commits](nf-core/setup-nextflow@v1...v2)

---
updated-dependencies:
- dependency-name: nf-core/setup-nextflow
  dependency-type: direct:production
  update-type: version-update:semver-major
...

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

Author: dependabot[bot]

.github/workflows/ci_workflows.yml

@@ -61,7 +61,7 @@ jobs:
 
       - name: Install Nextflow
         if: matrix.name == 'Nextflow'
-        uses: nf-core/setup-nextflow@v1
+        uses: nf-core/setup-nextflow@v2
         with:
           version: latest-stable