pypy: fix url

component/pypy/buildout.cfg

@@ -23,7 +23,7 @@ make-targets = python setup.py install --install-lib @@LOCATION@@
 [pypy2]
 recipe = slapos.recipe.cmmi
 shared = true
-url = https://bitbucket.org/pypy/pypy/downloads/pypy2.7-v7.3.1-src.tar.bz2
+url = https://downloads.python.org/pypy/pypy2.7-v7.3.1-src.tar.bz2
 md5sum = 7608bd58940ffc5403632c2c786d83bb
 configure-command =
   sed -i '/"_tkinter":/s/^/#/' lib_pypy/tools/build_cffi_imports.py