Merge pull request mendersoftware#2196 from tranchitella/fix-broken-links

fix: broken link for ttssh2

Author: Fabio Tranchitella

301.Troubleshoot/05.Device-Runtime/docs.md

@@ -38,7 +38,7 @@ For the Raspberry Pi, please see
 for more details.
 
 On Windows, the following applications can be used to access the serial console:
-* [https://osdn.net/projects/ttssh2/](https://osdn.net/projects/ttssh2/?target=_blank)
+* [https://ttssh2.osdn.jp/index.html.en](https://ttssh2.osdn.jp/index.html.en?target=_blank)
 * [https://putty.org/](https://putty.org/?target=_blank)
 
 On MacOS, [this web page](https://pbxbook.com/other/mac-ser.html?target=_blank)