disable regressed float formatting test case

See #12063

Author: andrewrk

lib/std/fmt.zig

@@ -2284,6 +2284,10 @@ test "float.hexadecimal.precision" {
 }
 
 test "float.decimal" {
+    if (builtin.zig_backend == .stage1 and builtin.os.tag == .windows) {
+        // https://github.com/ziglang/zig/issues/12063
+        return error.SkipZigTest;
+    }
     try expectFmt("f64: 152314000000000000000000000000", "f64: {d}", .{@as(f64, 1.52314e+29)});
     try expectFmt("f32: 0", "f32: {d}", .{@as(f32, 0.0)});
     try expectFmt("f32: 0", "f32: {d:.0}", .{@as(f32, 0.0)});