Adjust Jenkinsfile for move of releng.aggregator to github

Change-Id: If8d00ced9ee5c00ab7f52723834e578a84ed2aa7
Reviewed-on: https://git.eclipse.org/r/c/platform/eclipse.platform.swt.binaries/+/190639
Tested-by: Platform Bot <platform-bot@eclipse.org>
Reviewed-by: Alexander Kurtakov <akurtako@redhat.com>
diff --git a/Jenkinsfile b/Jenkinsfile
index 066de97..ec9ff1d 100644
--- a/Jenkinsfile
+++ b/Jenkinsfile
@@ -129,7 +129,7 @@
 			}
 			steps {
 				container('jnlp') {
-					sh "wget https://git.eclipse.org/c/platform/eclipse.platform.releng.aggregator.git/plain/scripts/verifyFreezePeriod.sh"
+					sh "wget https://raw.githubusercontent.com/eclipse-platform/eclipse.platform.releng.aggregator/master/scripts/verifyFreezePeriod.sh"
 					sh "chmod +x verifyFreezePeriod.sh"
 					withCredentials([string(credentialsId: 'google-api-key', variable: 'GOOGLE_API_KEY')]) {
 						sh './verifyFreezePeriod.sh'