Update getting_started with better example (langchain-ai#1910)

I noticed that the "getting started" guide section on agents included an
example test where the agent was getting the question wrong 😅

I guess Olivia Wilde's dating life is too tough to keep track of for
this simple agent example. Let's change it to something a little easier,
so users who are running their agent for the first time are less likely
to be confused by a result that doesn't match that which is on the docs.

docs/getting_started/getting_started.md

@@ -210,28 +210,24 @@ tools = load_tools(["serpapi", "llm-math"], llm=llm)
 agent = initialize_agent(tools, llm, agent="zero-shot-react-description", verbose=True)
 
 # Now let's test it out!
-agent.run("Who is Olivia Wilde's boyfriend? What is his current age raised to the 0.23 power?")
+agent.run("What was the high temperature in SF yesterday in Fahrenheit? What is that number raised to the .023 power?")
 ```
 
 ```pycon
-Entering new AgentExecutor chain...
- I need to find out who Olivia Wilde's boyfriend is and then calculate his age raised to the 0.23 power.
-Action: Search
-Action Input: "Olivia Wilde boyfriend"
-Observation: Jason Sudeikis
-Thought: I need to find out Jason Sudeikis' age
+> Entering new AgentExecutor chain...
+ I need to find the temperature first, then use the calculator to raise it to the .023 power.
 Action: Search
-Action Input: "Jason Sudeikis age"
-Observation: 47 years
-Thought: I need to calculate 47 raised to the 0.23 power
+Action Input: "High temperature in SF yesterday"
+Observation: San Francisco Temperature Yesterday. Maximum temperature yesterday: 57 °F (at 1:56 pm) Minimum temperature yesterday: 49 °F (at 1:56 am) Average temperature ...
+Thought: I now have the temperature, so I can use the calculator to raise it to the .023 power.
 Action: Calculator
-Action Input: 47^0.23
-Observation: Answer: 2.4242784855673896
+Action Input: 57^.023
+Observation: Answer: 1.0974509573251117
 
 Thought: I now know the final answer
-Final Answer: Jason Sudeikis, Olivia Wilde's boyfriend, is 47 years old and his age raised to the 0.23 power is 2.4242784855673896.
-> Finished AgentExecutor chain.
-"Jason Sudeikis, Olivia Wilde's boyfriend, is 47 years old and his age raised to the 0.23 power is 2.4242784855673896."
+Final Answer: The high temperature in SF yesterday in Fahrenheit raised to the .023 power is 1.0974509573251117.
+
+> Finished chain.
 ```