Apply Security Best Practices to scorecard.yml (#589)

Via [StepSecurity](https://app.stepsecurity.io/secureworkflow).

Author: Chrimle

.github/workflows/scorecard.yml

@@ -33,6 +33,11 @@ jobs:
       # actions: read
 
     steps:
+      - name: Harden the runner (Audit all outbound calls)
+        uses: step-security/harden-runner@a90bcbc6539c36a85cdfeb73f7e2f433735f215b # v2.15.0
+        with:
+          egress-policy: audit
+
       - name: "Checkout code"
         uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # v4.2.2
         with:
@@ -73,6 +78,6 @@ jobs:
       # Upload the results to GitHub's code scanning dashboard (optional).
       # Commenting out will disable upload of results to your repo's Code Scanning dashboard
       - name: "Upload to code-scanning"
-        uses: github/codeql-action/upload-sarif@v3
+        uses: github/codeql-action/upload-sarif@ae9ef3a1d2e3413523c3741725c30064970cc0d4 # v3.32.5
         with:
           sarif_file: results.sarif