Fix invalid commit hash for upload-artifact action

- Replace invalid hash with correct commit hash for v4.4.0
- Fixes workflow execution error where action could not be found
- Uses proper SHA commit hash for security pinning

Author: isaiah-grafana

.github/workflows/reusable-trufflehog.yml

@@ -189,7 +189,7 @@ jobs:
           } > trufflehog_scan.txt
 
       - name: Upload scan results
-        uses: actions/upload-artifact@8e4a5c1e2e2e6e2c1e2e6e2c1e2e6e2c1e2e6e2c # v4.3.3
+        uses: actions/upload-artifact@50769540e7f4bd5e21e526ee35c689e35e0d6874 # v4.4.0
         if: always()
         with:
           name: trufflehog_scan