Rename XZ-1.8 to XZ-1.9 to reflect the actual version in the name

Author: steve-s

mx.graalpython/mx_graalpython.py

@@ -2172,7 +2172,7 @@ def verify_ci(dest_suite, common_ci_dir="ci_common", args=None, ext=('.jsonnet',
         'graalpython:BOUNCYCASTLE-PROVIDER',
         'graalpython:BOUNCYCASTLE-PKIX',
         'graalpython:BOUNCYCASTLE-UTIL',
-        'graalpython:XZ-1.8',
+        'graalpython:XZ-1.9',
     ],
     support_distributions=[
         'graalpython:GRAALPYTHON_GRAALVM_SUPPORT',