fix APIGW exports nullability exceptions

Author: sbiscigl

.changelog/7014a714c3444164aca6a5db2306b71d.json

@@ -0,0 +1,8 @@
+{
+    "id": "7014a714-c344-4164-aca6-a5db2306b71d",
+    "type": "bugfix",
+    "description": "Fix APIGW exports nullability exceptions strictness.",
+    "modules": [
+        "codegen"
+    ]
+}

codegen/smithy-aws-go-codegen/src/main/resources/software/amazon/smithy/aws/go/codegen/customization/APIGW_exports_nullability_exceptions.json

@@ -542,6 +542,7 @@
     "com.amazonaws.mediaconnect#MediaConnect": [
         "com.amazonaws.mediaconnect#__double",
         "com.amazonaws.mediaconnect#__integer",
+	"com.amazonaws.mediaconnect#__listOf__integer$member",
         "com.amazonaws.mediaconnect#AddMediaStreamRequest$ClockRate",
         "com.amazonaws.mediaconnect#AddMediaStreamRequest$MediaStreamId",
         "com.amazonaws.mediaconnect#AddOutputRequest$MaxLatency",