Update rp2040.rst (#1515)

earlephilhower · web-flow · commit 7b04a033b3c3 · 2023-06-08T09:49:57.000-07:00
diff --git a/docs/rp2040.rst b/docs/rp2040.rst
@@ -95,3 +95,7 @@ void rp2040.enableDoubleResetBootloader()
 Add a call anywhere in the sketch to ``rp2040.enableDoubleResetBootloader()`` and
 the core will check for a double-tap on reset, and if found will start the USB
 bootloader.
+
+void rp2040.rebootToBootloader()
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+Will reboot the RP2040 into USB UF2 upload mode.
