Update projection-operations (Zip section).md (#46792)

there is a typo issue , right below the last code snippet in the Zip section, the word 'numbers' should be replaced with 
word 'number'. The sentence is :

With the preceding Zip overload, the specified function is applied to the corresponding elements numbers and letter, producing a sequence of the string results.

Author: fcdeveloper00

docs/csharp/linq/standard-query-operators/projection-operations.md

@@ -76,7 +76,7 @@ The third overload accepts a `Func<TFirst, TSecond, TResult>` argument that acts
 
 :::code source="./snippets/standard-query-operators/SelectProjectionExamples.cs" id="ZipResultSelector":::
 
-With the preceding `Zip` overload, the specified function is applied to the corresponding elements `numbers` and `letter`, producing a sequence of the `string` results.
+With the preceding `Zip` overload, the specified function is applied to the corresponding elements `number` and `letter`, producing a sequence of the `string` results.
 
 ## `Select` versus `SelectMany`