Set version number to 2.0.0 release candidate 1

Author: jstrieb

build.zig.zon

@@ -1,6 +1,6 @@
 .{
     .name = .github_stats,
-    .version = "0.0.1",
+    .version = "2.0.0-rc.1",
     .fingerprint = 0x80bb05a632422e37, // Changing this has security and trust implications.
     .minimum_zig_version = "0.15.2",
     .dependencies = .{},