build(deps): bump julia-actions/julia-downgrade-compat from 1 to 2 (#40)

Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Author: dependabot[bot]

.github/workflows/downgrade.yml

@@ -44,7 +44,7 @@ jobs:
           show-versioninfo: true
           version: ${{ matrix.version }}
           arch: ${{ matrix.arch }}
-      - uses: julia-actions/julia-downgrade-compat@v1
+      - uses: julia-actions/julia-downgrade-compat@v2
         with:
           skip: Pkg,TOML
       - uses: julia-actions/cache@v2