Update query web example since wikipedia keeps changing (#13421)

# Description

Every so ofter wikipedia changes the column names which breaks the query
example. It would be good to make query web's table extraction to be
smart enough to find tables that are close. This PR fixes the example.

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crates/nu_plugin_query/src/query_web.rs

@@ -76,7 +76,7 @@ pub fn web_examples() -> Vec<Example<'static>> {
         },
         Example {
             example: "http get https://en.wikipedia.org/wiki/List_of_cities_in_India_by_population |
-        query web --as-table [City 'Population(2011)[3]' 'Population(2001)[3][a]' 'State or unionterritory' 'Ref']",
+        query web --as-table [City 'Population(2011)[3]' 'Population(2001)[3][a]' 'State or unionterritory' 'Reference']",
             description: "Retrieve a html table from Wikipedia and parse it into a nushell table using table headers as guides",
             result: None
         },