update spdx

Author: ladyada

TFP401_800x480_RP2040/TFP401_800x480_RP2040.ino

@@ -1,3 +1,7 @@
+// SPDX-FileCopyrightText: 2023 PaintYourDragon for Adafruit
+//
+// SPDX-License-Identifier: MIT
+
 // "Aquarium" example for PicoDVI library. If just starting out,
 // see the 8bit_double_buffer which explains the PicoDVI groundwork.
 // Comments in THIS file are mostly distinct & new concepts.

TFP401_800x480_RP2040/sprites.h

@@ -1,3 +1,7 @@
+// SPDX-FileCopyrightText: 2023 PaintYourDragon for Adafruit
+//
+// SPDX-License-Identifier: MIT
+
 // Graphics data for the aquarium PicoDVI example.
 // Unlike the flying toasters demo, this one uses a larger color palette
 // and 2:1 packing as described as a possible upgrade in that code is not