Update tensorflow patch to 2.15.0

Author: qunaibit

graalpython/lib-graalpython/patches/tensorflow/metadata.toml

@@ -1,3 +1,11 @@
+[[rules]]
+version = '== 2.15.0'
+patch = 'tensorflow-2.15.0.patch'
+
+[[add-sources]]
+version = '2.15.0'
+url = 'https://github.com/tensorflow/tensorflow/archive/refs/tags/v2.15.0.tar.gz'
+
 [[rules]]
 version = '== 2.14.0'
 patch = 'tensorflow-2.14.0.patch'