Everywhere: Fix spelling mistakes

Author: https://github.com/mjz19910
Commit: 10ec98dd38
Pull-request: https://github.com/SerenityOS/serenity/pull/11694
Reviewed-by: https://github.com/Dexesttp
Reviewed-by: https://github.com/creator1creeper1 ✅
Reviewed-by: https://github.com/linusg ✅

Kernel/Prekernel/Arch/aarch64/Mailbox.cpp

@@ -81,7 +81,7 @@ bool Mailbox::send_queue(void* queue, u32 queue_size) const
 
     auto& mmio = MMIO::the();
 
-    // The mailbox interface has a FIFO for message deliverly in both directions.
+    // The mailbox interface has a FIFO for message delivery in both directions.
     // Responses can be delivered out of order to requests, but we currently ever only send on request at once.
     // It'd be nice to have an async interface here where we send a message, then return immediately, and read the response when an interrupt arrives.
     // But for now, this is synchronous.