Fix failure to ignore simulink autosave file

`.autosave` does not match the name of autosave file generated by
simulink. A leading asterisk(*) is needed to match such name.

Global/Matlab.gitignore

@@ -19,4 +19,4 @@ slprj/
 octave-workspace
 
 # Simulink autosave extension
-.autosave
+*.autosave