Update ownership of dotnet tutorials

Author: meaghanlewis

.github/CODEOWNERS

@@ -122,7 +122,7 @@
 # Tools
 /docs/core/tools/ @adegeo @dotnet/docs
 # Tutorials
-/docs/core/tutorials/ @BillWagner @dotnet/docs
+/docs/core/tutorials/ @meaghanlewis @dotnet/docs
 # What's new
 /docs/core/whats-new/ @dotnet/docs
 

docfx.json

@@ -365,7 +365,7 @@
                 "docs/core/runtime-config/**/**.md": "gewarren",
                 "docs/core/testing/**/**.md": "IEvangelist",
                 "docs/core/tools/**/**.md": "adegeo",
-                "docs/core/tutorials/**/**.md": "billwagner",
+                "docs/core/tutorials/**/**.md": "meaghanlewis",
                 "docs/core/versions/**/**.md": "billwagner",
                 "docs/core/whats-new/**/**.md": "gewarren",
                 "docs/csharp/**/*.*": "billwagner",
@@ -458,7 +458,7 @@
                 "docs/core/runtime-config/**/**.md": "gewarren",
                 "docs/core/testing/**/**.md": "dapine",
                 "docs/core/tools/**/**.md": "adegeo",
-                "docs/core/tutorials/**/**.md": "wiwagn",
+                "docs/core/tutorials/**/**.md": "mosagie",
                 "docs/core/versions/**/**.md": "wiwagn",
                 "docs/core/whats-new/**/**.md": "gewarren",
                 "docs/csharp/**/*.*": "wiwagn",