Update vulnerability_scan self-reference SHA to include pinned actions

The previous SHA pointed to the old v3 commit before actions were pinned,
causing the same SHA pinning error for transitive dependencies.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

Author: BehnamMozafari

.github/workflows/shared-build-and-test.yaml

@@ -72,7 +72,7 @@ jobs:
           path: ${{ inputs.working_dir }}/target/site/jacoco/*
 
       - name: Vulnerability Scan
-        uses: IABTechLab/uid2-shared-actions/actions/vulnerability_scan@aa84a60f4774fd78427d3882418dd913588abd8d # v3
+        uses: IABTechLab/uid2-shared-actions/actions/vulnerability_scan@83defcc6516d8965a7807af3152c0b83f0b755ff # v3
         with:
           scan_severity: HIGH,CRITICAL
           failure_severity: ${{ inputs.vulnerability_severity }}