chore: add sc-client 25.4.2 source URL (#14)

Co-authored-by: copilot-swe-agent[bot] <198982749+Copilot@users.noreply.github.com>

Author: Copilot

.github/workflows/publish.yml

@@ -86,6 +86,7 @@ jobs:
                   "toolName": "sc-client",
                   "toolUrls": {
                      "26.2.0": ["https://tools.fortify.com/scancentral/Fortify_ScanCentral_Client_26.2.0_x64.zip"],
+                     "25.4.2": ["https://tools.fortify.com/scancentral/Fortify_ScanCentral_Client_25.4.2_x64.zip"],
                      "25.4.1": ["https://tools.fortify.com/scancentral/Fortify_ScanCentral_Client_25.4.1_x64.zip"],
                      "25.4.0": ["https://tools.fortify.com/scancentral/Fortify_ScanCentral_Client_25.4.0_x64.zip"],
                      "25.2.1": ["https://tools.fortify.com/scancentral/Fortify_ScanCentral_Client_25.2.1_x64.zip"],