Fix JSON ignore conditions (#8416)

Author: gewarren

xml/System.Text.Json.Serialization/JsonIgnoreCondition.xml

@@ -38,7 +38,7 @@
       </ReturnValue>
       <MemberValue>1</MemberValue>
       <Docs>
-        <summary>Property will always be ignored.</summary>
+        <summary>Property is always ignored.</summary>
         <remarks>To be added.</remarks>
       </Docs>
     </Member>
@@ -61,7 +61,7 @@
       </ReturnValue>
       <MemberValue>0</MemberValue>
       <Docs>
-        <summary>Property will always be serialized and deserialized, regardless of <see cref="P:System.Text.Json.JsonSerializerOptions.IgnoreNullValues" /> configuration.</summary>
+        <summary>Property is always serialized and deserialized, regardless of <see cref="P:System.Text.Json.JsonSerializerOptions.IgnoreNullValues" /> configuration.</summary>
         <remarks>To be added.</remarks>
       </Docs>
     </Member>
@@ -84,7 +84,7 @@
       </ReturnValue>
       <MemberValue>2</MemberValue>
       <Docs>
-        <summary>Property will only be ignored if it is <see langword="null" />.</summary>
+        <summary>Property is ignored only if it equals the <see href=" https://learn.microsoft.com/dotnet/csharp/language-reference/builtin-types/default-values">default value</see> for its type.</summary>
         <remarks>To be added.</remarks>
       </Docs>
     </Member>
@@ -107,7 +107,7 @@
       </ReturnValue>
       <MemberValue>3</MemberValue>
       <Docs>
-        <summary>If the value is <see langword="null" />, the property is ignored during serialization. This is applied only to reference-type properties and fields.</summary>
+        <summary>Property is ignored if its value is <see langword="null" />. This is applied only to reference-type properties and fields.</summary>
         <remarks>To be added.</remarks>
       </Docs>
     </Member>