Change version to 1.59.0 (#6695)

ginayeh · dfawley · web-flow · commit 7765221f4bf6 · 2023-10-17T14:58:23.000-07:00
Co-authored-by: Doug Fawley &lt;dfawley@google.com&gt;
diff --git a/version.go b/version.go
@@ -19,4 +19,4 @@
 package grpc
 
 // Version is the current grpc version.
-const Version = "1.59.0-dev"
+const Version = "1.59.0"
