Update Amazon.Lambda.Templates version for release (#1643)

* Update Amazon.Lambda.Templates version for release
* test: Fix test that was asserting against error message after #1638 fixed typos.

Author: ashovlin

Blueprints/BlueprintDefinitions/vs2022/template.nuspec

@@ -2,7 +2,7 @@
 <package xmlns="http://schemas.microsoft.com/packaging/2010/07/nuspec.xsd">
   <metadata>
     <id>Amazon.Lambda.Templates</id>
-    <version>6.15.0</version>
+    <version>6.15.1</version>
     <authors>Amazon Web Services</authors>
     <tags>AWS Amazon Lambda</tags>
     <description>AWS Lambda templates for Microsoft Template Engine accessible with the dotnet CLI's new command</description>

Libraries/test/Amazon.Lambda.Annotations.SourceGenerators.Tests/SourceGeneratorTests.cs

@@ -1147,7 +1147,7 @@ public async Task ComplexQueryParameters_AreNotSupported()
                     ExpectedDiagnostics =
                     {
                          DiagnosticResult.CompilerError("AWSLambda0109").WithSpan($"TestServerlessApp{Path.DirectorySeparatorChar}ComplexQueryParameter.cs", 11, 9, 16, 10)
-                                            .WithMessage("Unsupported query paramter 'person' of type 'TestServerlessApp.Person' encountered. Only primitive .NET types and their corresponding enumerables can be used as query parameters.")
+                                            .WithMessage("Unsupported query parameter 'person' of type 'TestServerlessApp.Person' encountered. Only primitive .NET types and their corresponding enumerable can be used as query parameters.")
                     },
                     ReferenceAssemblies = ReferenceAssemblies.Net.Net60
                 }