Update v8-feature-tracker.md (#1316)

Author: RexJaeschke

admin/v8-feature-tracker.md

@@ -13,7 +13,7 @@ override with constraints ([MS Proposal](https://github.com/dotnet/csharplang/bl
 unmanaged constructed types ([MS Proposal](https://github.com/dotnet/csharplang/blob/main/proposals/csharp-8.0/constructed-unmanaged.md)) | [604](https://github.com/dotnet/csharpstandard/pull/604) | Merged | small | N/A |
 default interface methods ([MS Proposal](https://github.com/dotnet/csharplang/blob/main/proposals/csharp-8.0/default-interface-methods.md)) | [681](https://github.com/dotnet/csharpstandard/pull/681) | Completed | medium |  Done |
 permit `stackalloc` in nested contexts ([MS Proposal](https://github.com/dotnet/csharplang/blob/main/proposals/csharp-8.0/nested-stackalloc.md)) | [1056](https://github.com/dotnet/csharpstandard/pull/1056), [1211](https://github.com/dotnet/csharpstandard/pull/1211) | Merged | small | N/A | 
-`notnull` constraint ([MS Proposal](https://github.com/dotnet/csharplang/blob/main/proposals/csharp-8.0/notnull-constraint.md)) | [830](https://github.com/dotnet/csharpstandard/pull/830) | Completed | small |  Done | 
+`notnull` constraint ([MS Proposal](https://github.com/dotnet/csharplang/blob/main/proposals/csharp-8.0/notnull-constraint.md)) | [830](https://github.com/dotnet/csharpstandard/pull/830) | Merged | small |  Done | 
 null coalescing assignment ([MS Proposal](https://github.com/dotnet/csharplang/blob/main/proposals/csharp-8.0/null-coalescing-assignment.md)) | [609](https://github.com/dotnet/csharpstandard/pull/609) | HELP NEEDED | small |  N/A | See Issue [#737](https://github.com/dotnet/csharpstandard/issues/737)
 nullable reference types ([MS Proposal (from V9)](https://github.com/dotnet/csharplang/blob/main/proposals/csharp-9.0/nullable-reference-types-specification.md) which supercedes ([MS Proposal (from V8)](https://github.com/dotnet/csharplang/blob/main/proposals/csharp-8.0/nullable-reference-types.md)) |[700](https://github.com/dotnet/csharpstandard/pull/700), [1178](https://github.com/dotnet/csharpstandard/pull/1178), [1191](https://github.com/dotnet/csharpstandard/pull/1191), [1192](https://github.com/dotnet/csharpstandard/pull/1192), [1195](https://github.com/dotnet/csharpstandard/pull/1195) | Merged | large  | Done | related to V8 "notnull" feature 
 Obsolete on property accessor ([MS Proposal](https://github.com/dotnet/csharplang/blob/main/proposals/csharp-8.0/obsolete-accessor.md)) | **no change needed** | Postponed | | N/A | See Issue [#375](https://github.com/dotnet/csharpstandard/issues/375)
@@ -22,4 +22,4 @@ ranges and indices ([MS Proposal](https://github.com/dotnet/csharplang/blob/main
 readonly instance members ([MS Proposal](https://github.com/dotnet/csharplang/blob/main/proposals/csharp-8.0/readonly-instance-members.md)) | [673](https://github.com/dotnet/csharpstandard/pull/673) | Completed | small | N/A  | 
 name shadowing in nested functions ([MS Proposal](https://github.com/dotnet/csharplang/blob/main/proposals/csharp-8.0/shadowing-in-nested-functions.md)) | [608](https://github.com/dotnet/csharpstandard/pull/608) | Merged | small | N/A  |
 static local functions ([MS Proposal](https://github.com/dotnet/csharplang/blob/main/proposals/csharp-8.0/static-local-functions.md)) | [869](https://github.com/dotnet/csharpstandard/pull/869)| Merged | small | N/A | 
-Disposable ref structs [672](https://github.com/dotnet/csharpstandard/pull/672) | | **???**  | | | Included in PR [606](https://github.com/dotnet/csharpstandard/pull/606); **Check this**
+Disposable ref structs | | | | | Included in PR [606](https://github.com/dotnet/csharpstandard/pull/606)