Update package description for 1.3.0 (#26)

Author: weichch

src/SystemTextJson.JsonDiffPatch/SystemTextJson.JsonDiffPatch.csproj

@@ -7,7 +7,7 @@
   <PropertyGroup>
     <PackageId>SystemTextJson.JsonDiffPatch</PackageId>
     <PackageTags>json;diff;compare;patch;system-text-json;jsondiffpatch</PackageTags>
-    <Description>High-performance, low-allocating JSON object diff and patch extension for System.Text.Json. Support generating patch document in RFC 6902 JSON Patch format. Provides bonus DeepClone and DeepEquals methods.</Description>
+    <Description>High-performance, low-allocating JSON object diff and patch extension for System.Text.Json. Support generating patch document in RFC 6902 JSON Patch format. Provides bonus DeepEquals and DeepClone methods.</Description>
   </PropertyGroup>
 
   <ItemGroup>