Pin dependencies

[Alan-Jowett]

This pull request includes changes to the fuzzing.yml workflow file in the .github/workflows directory. The changes primarily involve updating the versions of the GitHub Actions used in the workflow. The versions of actions/checkout, actions/cache, and actions/upload-artifact have been updated to specific commit hashes instead of version tags.

Here are the key changes:

• .github/workflows/fuzzing.yml: The actions/checkout action has been updated from version v4.1.6 to commit hash a5ac7e51b41094c92402da3b24376905380afc29. This change occurs twice in the workflow, once at the beginning and once later in the workflow. [1] [2]
• .github/workflows/fuzzing.yml: The actions/cache action has been updated from version v4.0.2 to commit hash 0c45773b623bea8c8e75f6c82b208c3cf94ea4f9.
• .github/workflows/fuzzing.yml: The actions/upload-artifact action has been updated from version v2 to commit hash 82c141cc518b40d92cc801eee768e7aafc9c2fa2. This change occurs twice in the workflow. [1] [2]
• .github/workflows/fuzzing.yml: The actions/download-artifact action has been updated from version v4 to commit hash 65a9edc5881444af0b9093a5e628f2fe47ea3b2e.

[coveralls]

coverage: 81.564%. first build when pulling b085e5e62edf7c1821bb1580c1058d8a3abfcee6 on fix_pinned_dependencies into 25425b90c61e34504d90916dc6f9ee9f6a1fffb4 on main.