Fix remarks for JsonElement TryGetDouble and TryGetSingle (#3719)

* Fix remarks for JsonElement TryGetDouble and TryGetSingle

Add missing `"` and change `it returns false` to `it returns <see langword="true">`

* Update xml/System.Text.Json/JsonElement.xml

Co-Authored-By: Genevieve Warren <[email protected]>

Author: ahsonkhan

xml/System.Text.Json/JsonElement.xml

@@ -1159,7 +1159,7 @@ This method does not parse the contents of a JSON string value.
 
 This method does not parse the contents of a JSON string value.
 
-On .NET Core, this method does not return `false` for values larger than <xref:System.Double.MaxValue?displayProperty=nameWithType> or smaller than <xref:System.Double.MinValue?displayProperty=nameWithType>. Instead, it returns <see langword="true> and assigns <xref:System.Double.PositiveInfinity?displayProperty=nameWithType> or <xref:System.Double.NegativeInfinity?displayProperty=nameWithType> to `value`.
+On .NET Core, this method does not return `false` for values larger than <xref:System.Double.MaxValue?displayProperty=nameWithType> or smaller than <xref:System.Double.MinValue?displayProperty=nameWithType>. Instead, it returns `true` and assigns <xref:System.Double.PositiveInfinity?displayProperty=nameWithType> or <xref:System.Double.NegativeInfinity?displayProperty=nameWithType> to `value`.
 
           ]]></format>
         </remarks>
@@ -1515,7 +1515,7 @@ This method does not parse the contents of a JSON string value.
 
 This method does not parse the contents of a JSON string value.
 
-On .NET Core, this method does not return `false` for values larger than <xref:System.Single.MaxValue?displayProperty=nameWithType> or smaller than <xref:System.Single.MinValue?displayProperty=nameWithType>). Instead, it returns `false` and assigns <xref:System.Single.PositiveInfinity?displayProperty=nameWithType> or <xref:System.Single.NegativeInfinity?displayProperty=nameWithType> to the `value` argument.
+On .NET Core, this method does not return `false` for values larger than <xref:System.Single.MaxValue?displayProperty=nameWithType> or smaller than <xref:System.Single.MinValue?displayProperty=nameWithType>). Instead, it returns `true` and assigns <xref:System.Single.PositiveInfinity?displayProperty=nameWithType> or <xref:System.Single.NegativeInfinity?displayProperty=nameWithType> to the `value` argument.
 
           ]]></format>
         </remarks>