Update ruby-build to version v20250925 (#470)

Author: Stratus3D

lib/utils.sh

@@ -1,6 +1,6 @@
 #!/usr/bin/env bash
 
-RUBY_BUILD_VERSION="${ASDF_RUBY_BUILD_VERSION:-v20250916.1}"
+RUBY_BUILD_VERSION="${ASDF_RUBY_BUILD_VERSION:-v20250925}"
 RUBY_BUILD_TAG="$RUBY_BUILD_VERSION"
 
 echoerr() {