Rename the license file of TruffleRuby.

Author: ansalond

mx.truffleruby/mx_truffleruby.py

@@ -123,7 +123,7 @@ def ruby_testdownstream_sulong(args):
     name='TruffleRuby license files',
     short_name='rbyl',
     dir_name='ruby',
-    license_files=['LICENSE_TRUFFLERUBY.md'],
+    license_files=['LICENSE_TRUFFLERUBY.txt'],
     third_party_license_files=['3rd_party_licenses_truffleruby.txt'],
     truffle_jars=[],
     support_distributions=[

mx.truffleruby/suite.py

@@ -486,7 +486,7 @@
             "platformDependent": True,
             "description": "TruffleRuby support distribution for the GraalVM license files",
             "layout": {
-                "LICENSE_TRUFFLERUBY.md": "file:LICENCE.md",
+                "LICENSE_TRUFFLERUBY.txt": "file:LICENCE.md",
                 "3rd_party_licenses_truffleruby.txt": "file:3rd_party_licenses.txt",
             },
         },