Add quotes to memory monitor command example (#3430)

### Changes

As in the description.

Author: nikita-savelyevv

tools/README.md

@@ -21,7 +21,7 @@ python memory_monitor.py --log-dir ./allocation_logs python allocate.py
 ```
 
 ```shell
-python memory_monitor.py optimum-cli export openvino ...
+python memory_monitor.py "optimum-cli export openvino ..."
 ```
 
 ### Example 2. As a python Module

tools/memory_monitor.py

@@ -350,7 +350,7 @@ def _subtract_first_element(data):
         description="Memory Monitor Tool. Monitors memory for an executable and saves logs at specified location.",
         epilog="Examples:\n"
         "   python memory_monitor.py --log-dir ./allocation_logs python allocate.py\n"
-        "   python memory_monitor.py optimum-cli export openvino ...",
+        '   python memory_monitor.py "optimum-cli export openvino ..."',
         formatter_class=argparse.RawTextHelpFormatter,
     )
     parser.add_argument(