Typo fix platform.txt

Author: earlephilhower

platform.txt

@@ -114,7 +114,7 @@ build.debugscript=picoprobe_cmsis_dap.tcl
 build.picodebugflags=
 build.variantdefines=
 
-# Allow Pico boards do be auto-discovered by the IDE
+# Allow Pico boards to be auto-discovered by the IDE
 #discovery.rp2040.pattern={runtime.tools.pqt-python3.path}/python3 -I "{runtime.platform.path}/tools/pluggable_discovery.py"
 discovery.rp2040.pattern={runtime.platform.path}/system/python3/python3 -I "{runtime.platform.path}/tools/pluggable_discovery.py"
 #pluggable_discovery.rp2040.pattern="{runtime.tools.pqt-python3.path}/python3" -I "{runtime.platform.path}/tools/pluggable_discovery.py"