[master] update changelog for merge of 2126

since the b10-showtech had not been released yet, I just replaced its name in the existing changelog entry

ChangeLog

@@ -45,7 +45,7 @@
 	(Trac #1986, git bd6b0a5ed3481f78fb4e5cb0b18c7b6e5920f9f8)
 
 452.	[func]*		muks
-	b10-showtech: An initial implementation of the b10-showtech tool
+	isc-sysinfo: An initial implementation of the isc-sysinfo tool
 	is now available. It gathers and outputs system information which
 	can be used by future tech support staff.
 	(Trac #2062, git 144e80212746f8d55e6a59edcf689fec9f32ae95)