Update release plugins to 1.48.0 to workaround SVN 1.9 issue with mv+cp

See https://issues.apache.org/jira/browse/SVN-4666
See https://github.com/vlsi/asflike-release-environment/issues/1
diff --git a/gradle.properties b/gradle.properties
index 1699514..8b207ea 100644
--- a/gradle.properties
+++ b/gradle.properties
@@ -35,7 +35,7 @@
 com.diffplug.gradle.spotless.version=3.25.0
 com.github.johnrengelman.shadow.version=5.1.0
 com.github.spotbugs.version=2.0.0
-com.github.vlsi.vlsi-release-plugins.version=1.47.0
+com.github.vlsi.vlsi-release-plugins.version=1.48.0
 com.google.protobuf.version=0.8.10
 de.thetaphi.forbiddenapis.version=2.7
 org.jetbrains.gradle.plugin.idea-ext.version=0.5