Add missing title/description (#44516)

Author: gewarren

docfx.json

@@ -633,6 +633,7 @@
                 "_csharplang/proposals/csharp-9.0/target-typed-new.md": "Target-typed new expressions",
                 "_csharplang/proposals/csharp-9.0/top-level-statements.md": "Top-level statements",
                 "_csharplang/proposals/csharp-9.0/unconstrained-type-parameter-annotations.md": "Unconstrained type parameter annotations",
+                "_csharplang/proposals/csharp-9.0/variance-safety-for-static-interface-members.md": "Variance safety for static interface members",
                 "_csharplang/proposals/csharp-10.0/record-structs.md": "Record structs",
                 "_csharplang/proposals/csharp-10.0/parameterless-struct-constructors.md": "Parameterless struct constructors",
                 "_csharplang/proposals/csharp-10.0/GlobalUsingDirective.md": "Global using directive",
@@ -752,7 +753,8 @@
                 "_csharplang/proposals/csharp-9.0/target-typed-conditional-expression.md": "This feature specification describes syntax rules to find a best match for the target of a conditional expression (?:).",
                 "_csharplang/proposals/csharp-9.0/target-typed-new.md": "This feature specification describes the enhancements to 'new' where the target type can be inferred from the variable declaration.",
                 "_csharplang/proposals/csharp-9.0/top-level-statements.md": "This feature specification describes top-level statements, which are program statements that replace the typical 'Main' method enclosed in a startup class.",
-                "_csharplang/proposals/csharp-9.0/unconstrained-type-parameter-annotations.md": "This feature specification unconstrained type parameter annotations. This enables 'T?' to be used where 'T' is not constrained to be either a value type or a reference type.",
+                "_csharplang/proposals/csharp-9.0/unconstrained-type-parameter-annotations.md": "This feature specification describes unconstrained type parameter annotations. This enables 'T?' to be used where 'T' is not constrained to be either a value type or a reference type.",
+                "_csharplang/proposals/csharp-9.0/variance-safety-for-static-interface-members.md": "This feature specification describes variance safety for static interface members",
                 "_csharplang/proposals/csharp-10.0/record-structs.md": "This feature specification describes record structs, which are structs where the compiler generates methods similar to those for record classes.",
                 "_csharplang/proposals/csharp-10.0/parameterless-struct-constructors.md": "This feature specification parameterless struct constructors, which can now be declared for structs. The rules for when they are called describe behavior in arrays and other variable declarations.",
                 "_csharplang/proposals/csharp-10.0/GlobalUsingDirective.md": "This feature specification describes global using directives, which add a using directive to every file compiled as part of an assembly.",