Fix 2 more places

Author: jasongin

src/NodeApi.Generator/SymbolExtensions.cs

@@ -329,7 +329,7 @@ private static Type BuildSymbolicObjectType(
             foreach (AttributeData attribute in typeSymbol.GetAttributes())
             {
                 if (attribute.AttributeClass!.ContainingNamespace.ToString()!.StartsWith(
-                        typeof(JSExportAttribute).Namespace!))
+                        typeof(JSExportAttribute).Namespace!, StringComparison.Ordinal))
                 {
                     Type attributeType = attribute.AttributeClass.AsType();
                     ConstructorInfo constructor = attributeType.GetConstructor(

test/TestBuilder.cs

@@ -260,7 +260,7 @@ private static void WriteCurrentFrameworkGlobalJson(string workingDirectory)
         {
             // Append the .NET preview version to the SDK version requested in global.json.
             sdkVersion += RuntimeInformation.FrameworkDescription.Substring(
-                RuntimeInformation.FrameworkDescription.IndexOf("-preview."));
+                RuntimeInformation.FrameworkDescription.IndexOf("-preview.", StringComparison.Ordinal) +);
         }
 
         string globalJson = $$"""