Fix minor issues in the tvmc tune CLI (apache#8039)

* [TVMC] convert timeout flag to int

fixes Check failed: type_code_ == kDLInt (11 vs. 0) : expected int but got str
when setting the timeout option using the cli flag.

* [TVMC] fix typo in tvmc tune help

python/tvm/driver/tvmc/autotuner.py

@@ -116,7 +116,7 @@ def add_tune_parser(subparsers):
         help="the host compilation target, defaults to 'llvm'",
         default="llvm",
     )
-    parser.add_argument("--timeout", default=10, help="compilation timeout, in seconds")
+    parser.add_argument("--timeout", type=int, default=10, help="compilation timeout, in seconds")
     parser.add_argument(
         "--trials",
         type=int,
@@ -142,7 +142,7 @@ def add_tune_parser(subparsers):
 
     auto_scheduler_group = parser.add_argument_group(
         "Autoscheduler options",
-        "Autoscheduler options, used when --enabled-auto-scheduler is provided",
+        "Autoscheduler options, used when --enable-autoscheduler is provided",
     )
 
     auto_scheduler_group.add_argument(