Typo fix in 01_tool_use_overview.ipynb

[brchristian]

Running the current notebook will produce the following output:

Cell In[5],   [line 2]
    "symbol”: “GM”,
    ^
SyntaxError: unterminated string literal (detected at line 2)

Changing the ” quotation marks to \" results in the expected cell output:

{'symbol': 'GM', 'price': 43.09}

[brchristian]

Hey @alexalbertt I saw that there was a merge conflict since the review on 9/17, so I’ve rebased to the current master. Hope that helps!