build(deps): bump actions/checkout from 4.1.7 to 4.2.1

.github/actions/setup-elixir-and-cache-deps/action.yml

@@ -33,7 +33,7 @@ outputs:
 runs:
   using: "composite"
   steps:
-    - uses: actions/checkout@692973e3d937129bcbf40652eb9f2f61becf3332 # v4.1.7
+    - uses: actions/checkout@eef61447b9ff4aafe5dcd4e0bbf5d482be7e7871 # v4.2.1
 
     - name: Setup Elixir and OTP
       id: beam