Bump jiro4989/setup-nim-action from 1 to 2

Bumps [jiro4989/setup-nim-action](https://github.com/jiro4989/setup-nim-action) from 1 to 2.
- [Release notes](https://github.com/jiro4989/setup-nim-action/releases)
- [Commits](jiro4989/setup-nim-action@v1...v2)

---
updated-dependencies:
- dependency-name: jiro4989/setup-nim-action
  dependency-type: direct:production
  update-type: version-update:semver-major
...

Signed-off-by: dependabot[bot] <[email protected]>

.github/workflows/test.yml

@@ -7,7 +7,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@v4
-      - uses: jiro4989/setup-nim-action@v1
+      - uses: jiro4989/setup-nim-action@v2
       - run: |
           cd tools
           nimble test -Y