publish the feature spec

Add the feature spec for allowing ref locals and unsafe blocks in iterators and async methods.

Author: BillWagner

docfx.json

@@ -491,7 +491,7 @@
                 "_csharplang/proposals/csharp-10.0/*.md": "08/07/2021",
                 "_csharplang/proposals/csharp-11.0/*.md": "09/30/2022",
                 "_csharplang/proposals/csharp-12.0/*.md": "08/15/2023",
-                "_csharplang/proposals/*.md": "05/15/2024",
+                "_csharplang/proposals/*.md": "06/28/2024",
                 "_roslyn/docs/compilers/CSharp/Compiler Breaking Changes - DotNet 7.md": "11/08/2022",
                 "_roslyn/docs/compilers/CSharp/Compiler Breaking Changes - DotNet 8.md": "09/26/2023",
                 "_roslyn/docs/compilers/CSharp/Compiler Breaking Changes - DotNet 9.md": "06/26/2024",
@@ -662,6 +662,7 @@
                 "_csharplang/proposals/lock-object.md": "Obey lock object semantics for lock statements",
                 "_csharplang/proposals/method-group-natural-type-improvements.md": "Method group natural type improvements",
                 "_csharplang/proposals/params-collections.md": "Params collections",
+                "_csharplang/proposals/ref-unsafe-in-terators-async.md": "Allow ref and unsafe in iterators and async methods",
                 "_roslyn/docs/compilers/CSharp/Compiler Breaking Changes - DotNet 7.md": "C# compiler breaking changes since C# 10",
                 "_roslyn/docs/compilers/CSharp/Compiler Breaking Changes - DotNet 8.md": "C# compiler breaking changes since C# 11",
                 "_roslyn/docs/compilers/CSharp/Compiler Breaking Changes - DotNet 9.md": "C# compiler breaking changes since C# 12",
@@ -778,6 +779,7 @@
                 "_csharplang/proposals/lock-object.md": "Special-case how `System.Threading.Lock` interacts with the `lock` keyword by calling its `EnterScope` method. Add static analysis warnings to prevent accidental misuse of the type where possible.",
                 "_csharplang/proposals/method-group-natural-type-improvements.md": "This proposal refines the determination of the natural type of a method group by considering candidates scope-by-scope and pruning at each scope.",
                 "_csharplang/proposals/params-collections.md": "Allow the `params` modifier on collection types beyond arrays, including `IEnumerable` types.",
+                "_csharplang/proposals/ref-unsafe-in-terators-async.md": "This proposal modifies restrictions to enable ref local variables and unsafe blocks in iterators and async methods",
                 "_roslyn/docs/compilers/CSharp/Compiler Breaking Changes - DotNet 7.md": "Learn about any breaking changes since the initial release of C# 10",
                 "_roslyn/docs/compilers/CSharp/Compiler Breaking Changes - DotNet 8.md": "Learn about any breaking changes since the initial release of C# 11",
                 "_roslyn/docs/compilers/CSharp/Compiler Breaking Changes - DotNet 9.md": "Learn about any breaking changes since the initial release of C# 12",

docs/csharp/specification/toc.yml

@@ -183,6 +183,8 @@ items:
       href: ../../../_csharplang/proposals/csharp-8.0/nested-stackalloc.md
     - name: Lock object semantics
       href: ../../../_csharplang/proposals/lock-object.md
+    - name: Allow `ref` and `unsafe`
+      href: ../../_csharplang/proposals/ref-unsafe-in-terators-async.md 
   - name: Namespaces
     items:
     - name: File scoped namespaces