chore: pin version of ocaml/setup-ocaml to v3.3.4

Author: vil02

.github/workflows/infer.yml

@@ -21,7 +21,7 @@ jobs:
           distribution: 'temurin'
 
       - name: Set up OCaml
-        uses: ocaml/setup-ocaml@v3
+        uses: ocaml/setup-ocaml@v3.3.4
         with:
           ocaml-compiler: 5