chore(deps): update hashicorp/vault-action action to v2.8.1 (#31)

Co-authored-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>

action.yaml

@@ -53,7 +53,7 @@ runs:
           core.setOutput('vault-role', `github-${context.repo.owner}-${context.repo.repo}`)
     - name: Vault Secrets
       id: secrets
-      uses: hashicorp/vault-action@e3d5714d59e151ca80233142880b9da9d983a48c # v2.7.5
+      uses: hashicorp/vault-action@9c2d817b85b9fff56bcab21cb74b485aee9e9d73 # v2.8.1
       with:
         url: ${{ inputs.url }}
         exportEnv: false