Add InlineIfLambda to Array.init (dotnet#19869)

Author: kerams

docs/release-notes/.FSharp.Core/11.0.100.md

@@ -2,3 +2,4 @@
 
 * Fix `Array.exists2` documentation examples to use equal-length arrays; the previous examples would throw `ArgumentException` at runtime instead of returning the documented `false`/`true` values. ([PR #19672](https://github.com/dotnet/fsharp/pull/19672))
 * Move `Async.StartChild` to the "Starting Async Computations" docs category alongside `Async.StartChildAsTask`. ([Issue #19667](https://github.com/dotnet/fsharp/issues/19667))
+* Add `InlineIfLambda` to `Array.init` ([PR #19869](https://github.com/dotnet/fsharp/pull/19869))

src/FSharp.Core/array.fs

@@ -47,7 +47,7 @@ module Array =
             Some array.[array.Length - 1]
 
     [<CompiledName("Initialize")>]
-    let inline init count initializer =
+    let inline init count ([<InlineIfLambda>] initializer) =
         Microsoft.FSharp.Primitives.Basics.Array.init count initializer
 
     [<CompiledName("ZeroCreate")>]