Fix the target name in documentation

Closes COVESA#365

Signed-off-by: Martin Willers <[email protected]>

Author: mawillers

doc/dlt_for_developers.md

@@ -69,7 +69,7 @@ You can thus:
 ```
 find_package(automotive-dlt REQUIRED)
 ...
-target_link_libraries(myapp PRIVATE Genivi::DLT)
+target_link_libraries(myapp PRIVATE Genivi::dlt)
 ```
 which lets your project automatically gain all necessary compile and link flags
 needed by libdlt, including the include directories.