Fix tests

Author: JamesNK

tests/Aspire.Hosting.Tests/ProjectResourceTests.cs

@@ -267,7 +267,8 @@ public async Task VerifyManifest(bool disableForwardedHeaders)
               "path": "another-path",
               "env": {
                 "OTEL_DOTNET_EXPERIMENTAL_OTLP_EMIT_EXCEPTION_LOG_ATTRIBUTES": "true",
-                "OTEL_DOTNET_EXPERIMENTAL_OTLP_EMIT_EVENT_LOG_ATTRIBUTES": "true"{{fordwardedHeadersEnvVar}}
+                "OTEL_DOTNET_EXPERIMENTAL_OTLP_EMIT_EVENT_LOG_ATTRIBUTES": "true",
+                "OTEL_DOTNET_EXPERIMENTAL_OTLP_RETRY": "in_memory"{{fordwardedHeadersEnvVar}}
               },
               "bindings": {
                 "http": {