Update style.yml

Author: ZippeyKeys12

.github/workflows/style.yml

@@ -21,7 +21,7 @@ jobs:
       - name: Checkout CN
         uses: actions/checkout@v4
 
-      - name: Install OCamlFormat
+      - name: Install OPAM
         run: |
           sudo apt-get install opam
 
@@ -49,7 +49,7 @@ jobs:
 
       - name: Check CN code formatting
         run: |
-          eval $(opam env)
+          eval $(opam env --switch=${{ matrix.version }})
           dune build @fmt
 
   clang-format: