Bump ocaml/setup-ocaml from 3.0.0.pre.alpha to 3.0.0.pre.beta

Bumps [ocaml/setup-ocaml](https://github.com/ocaml/setup-ocaml) from 3.0.0.pre.alpha to 3.0.0.pre.beta.
- [Release notes](https://github.com/ocaml/setup-ocaml/releases)
- [Changelog](https://github.com/ocaml/setup-ocaml/blob/master/CHANGELOG.md)
- [Commits](ocaml/setup-ocaml@v3.0.0-alpha...v3.0.0-beta)

---
updated-dependencies:
- dependency-name: ocaml/setup-ocaml
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

Signed-off-by: dependabot[bot] <[email protected]>

.github/workflows/workflow.yml

@@ -81,7 +81,7 @@ jobs:
         uses: actions/checkout@v4
 
       - name: Set-up OCaml
-        uses: ocaml/[email protected]alpha
+        uses: ocaml/[email protected]beta
         with:
           ocaml-compiler: ${{ matrix.ocaml-compiler }}
           opam-local-packages: ${{ matrix.local-packages }}
@@ -116,10 +116,10 @@ jobs:
         uses: actions/checkout@v4
 
       - name: Set-up OCaml
-        uses: ocaml/[email protected]alpha
+        uses: ocaml/[email protected]beta
         with:
           ocaml-compiler: "5.2"
           allow-prerelease-opam: true
           dune-cache: true
 
-      - uses: ocaml/setup-ocaml/[email protected]alpha
+      - uses: ocaml/setup-ocaml/[email protected]beta