[doc] Added --reset option for st-flash

(Closes #642)

doc/tutorial.md

@@ -8,6 +8,7 @@ stlink Tools Tutorial
 | --flash=n[k][m] | st-flash | One can specify `--flash=128k` for example, to override the default value of 64k<br />for the STM32F103C8T6 to assume 128k of flash being present. This option accepts<br />decimal (128k), octal 0200k, or hex 0x80k values. Leaving the multiplier out is<br />equally valid, e.g.: `--flash=0x20000`. The size may be followed by an optional "k"<br />or "m" to multiply the given value by 1k (1024) or 1M respectively. | v1.4.0 |
 | --freq=n[k][m] | st-flash,<br />st-util | The frequency of the SWD/JTAG interface can be specified, to override the default<br />1800 kHz configuration. This option solely accepts decimal values (5K or 1.8M) with<br />the unit `Hz` being left out. Valid frequencies are `5K, 15K, 25K, 50K, 100K,`<br />`125K, 240K, 480K, 950K, 1200K(1.2M), 1800K(1.8M), 4000K(4M)`. | v1.6.1 |
 | --opt | st-flash | Optimisation can be enabled in order to skip flashing empty (0x00 or 0xff) bytes at<br />the end of binary file. This may cause some garbage data left after a flash operation.<br />This option was enabled by default in earlier releases. | v1.6.1 |
+| --reset | st-flash | Trigger a reset both before and after flashing. | v1.0.0 |
 | --version | st-info,<br />st-flash,<br />st-util | Print version information. | |
 | --help | st-flash,<br />st-util | Print list of available commands. _(To be added to this table.)_ | |