Rename c_void to anyopaque (ziglang/zig/#10316)

README.md

@@ -218,7 +218,7 @@ Defaults are generated for certain fields of structs:
 ```zig
 pub const InstanceCreateInfo = extern struct {
     s_type: StructureType = .instance_create_info,
-    p_next: ?*const c_void = null,
+    p_next: ?*const anyopaque = null,
     flags: InstanceCreateFlags,
     ...
 };

generator/vulkan/render.zig

@@ -679,7 +679,7 @@ fn Renderer(comptime WriterType: type) type {
             }
 
             if (child_is_void) {
-                try self.writer.writeAll("c_void");
+                try self.writer.writeAll("anyopaque");
             } else {
                 try self.renderTypeInfo(pointer.child.*);
             }