Bump software version to 3.0

Update the bootloader software version string from 2.3 to 3.0 in the shared software_version header.

Author: vanvught

bootloader-tftp/include/software_version.h

@@ -26,6 +26,6 @@
 #ifndef SOFTWARE_VERSION_H_
 #define SOFTWARE_VERSION_H_
 
-constexpr char kSoftwareVersion[] = "2.3";
+constexpr char kSoftwareVersion[] = "3.0";
 
 #endif /* SOFTWARE_VERSION_H_ */