Update System.Memory.

Author: brian-reichle

src/TextTools/TextTools.csproj

@@ -57,7 +57,7 @@
           <PrivateAssets>all</PrivateAssets>
           <IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>
         </PackageReference>
-        <PackageReference Include="System.Memory" Version="4.5.5" />
+        <PackageReference Include="System.Memory" Version="4.6.3" />
       </ItemGroup>
     </Otherwise>
   </Choose>