Update install_option.py

Typo fix

Author: adrianomg

src/install_option.py

@@ -97,12 +97,12 @@ def install_func(spbench_path, args):
     print(color.BOLD + "                         >> IMPORTANT <<                         " + color.END)
     print(" ---------------------------------------------------------------\n")
     print(" Now you must run \'source setup_vars.sh\'\n to load the libraries.\n")
-    print(" Obs: You must load the libraries before using\n SPBench every time you star a new session!\n")
+    print(" Obs: You must load the libraries before using\n SPBench every time you start a new session!\n")
 
     if download_inputs_flag:
         args.app_id = "all"
         args.class_id = "all"
         args.force = True
         download_inputs_func(spbench_path, args, True)
 
-    sys.exit()
+    sys.exit()