Merge pull request #85 from ruby-go-gem/dependabot/github_actions/step-security/harden-runner-2.20.0

Bump step-security/harden-runner from 2.19.4 to 2.20.0

Author: sue445

.github/workflows/release_gem.yml

@@ -18,7 +18,7 @@ jobs:
 
     steps:
       - name: Harden Runner
-        uses: step-security/harden-runner@9af89fc71515a100421586dfdb3dc9c984fbf411 # v2.19.4
+        uses: step-security/harden-runner@bf7454d06d71f1098171f2acdf0cd4708d7b5920 # v2.20.0
         with:
           egress-policy: audit