Add runner template for probe-run

Author: sirhcel

.cargo/config

@@ -4,6 +4,7 @@
 # runner = "arm-none-eabi-gdb -q -x openocd.gdb"
 # runner = "gdb-multiarch -q -x openocd.gdb"
 # runner = "gdb -q -x openocd.gdb"
+# runner = "probe-run --chip STM32F303VCTx --connect-under-reset"
 
 rustflags = [
   # LLD (shipped with the Rust toolchain) is used as the default linker