Update callsite @noinline docstring to make clear it applies to calls in arguments too (#57586)

Based on #57396 it seems worth
calling this behaviour out explicitly since it's somewhat surprising.

Author: nickrobinson251

base/expr.jl

@@ -256,6 +256,14 @@ Give a hint to the compiler that calls within `block` are worth inlining.
     end
     ```
 
+!!! note
+    The callsite annotation applies to all calls in the block, including function arguments
+    that are themselves calls:
+    ```julia
+    # The compiler will not inline `getproperty`, `g` or `f`
+    @noinline f(x.inner, g(y))
+    ```
+
 !!! note
     When there are nested callsite annotations, the innermost annotation has the precedence:
     ```julia