[skip ci] update downgrade CI repo

Author: ArnoStrouwen

.github/workflows/Downgrade.yml

@@ -41,7 +41,7 @@ jobs:
       - uses: julia-actions/setup-julia@v1
         with:
           version: ${{ matrix.version }}
-      - uses: cjdoris/julia-downgrade-compat-action@v1
+      - uses: julia-actions/julia-downgrade-compat@v1
 #        if: ${{ matrix.version == '1.6' }}
         with:
           skip: Pkg,TOML
@@ -50,4 +50,4 @@ jobs:
         run: julia --project -e 'using Pkg; Pkg.Registry.add(RegistrySpec(url  = "https://github.com/HolyLab/HolyLabRegistry.git")); Pkg.add("QuadDIRECT")'
       - uses: julia-actions/julia-runtest@v1
         env:
-          GROUP: ${{ matrix.group }}
+          GROUP: ${{ matrix.group }}