Update main.yml

Author: gares

.github/workflows/main.yml

@@ -72,7 +72,7 @@ jobs:
           name: Coq-Elpi ${{ github.ref }} for Coq XXX
 
       - name: Use OCaml 4.14.x
-        uses: avsm/setup-ocaml@v2
+        uses: avsm/setup-ocaml@v3
         with:
           ocaml-compiler: 4.14.x
           opam-local-packages: |