Bump erlef/setup-beam from 1.20.2 to 1.20.4 (#418)

Bumps [erlef/setup-beam](https://github.com/erlef/setup-beam) from 1.20.2 to 1.20.4.
- [Release notes](https://github.com/erlef/setup-beam/releases)
- [Commits](erlef/setup-beam@6389fe5...e6d7c94)

---
updated-dependencies:
- dependency-name: erlef/setup-beam
  dependency-version: 1.20.4
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

Signed-off-by: dependabot[bot] <[email protected]>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Author: dependabot[bot]

.github/workflows/main.yml

@@ -38,7 +38,7 @@ jobs:
       - uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # v4.2.2
 
       - name: Install OTP and Elixir
-        uses: erlef/setup-beam@6389fe58dcb1ee91fd829c7c65bf8771b06dacc4 # v1.20.2
+        uses: erlef/setup-beam@e6d7c94229049569db56a7ad5a540c051a010af9 # v1.20.4
         with:
           otp-version: ${{ matrix.erlang }}
           elixir-version: ${{ matrix.elixir }}

.github/workflows/publish-to-hex.yml

@@ -19,7 +19,7 @@ jobs:
         uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # v4.2.2
 
       - name: Install Erlang and Elixir
-        uses: erlef/setup-beam@6389fe58dcb1ee91fd829c7c65bf8771b06dacc4 # v1.20.2
+        uses: erlef/setup-beam@e6d7c94229049569db56a7ad5a540c051a010af9 # v1.20.4
         with:
           otp-version: "26.0.2"
           elixir-version: "1.15.4"