AWS SSO OIDC Update: Update FIPS endpoints in aws-us-gov.

Author: AWS

.changes/next-release/feature-AWSSSOOIDC-b2096b8.json

@@ -0,0 +1,6 @@
+{
+    "type": "feature",
+    "category": "AWS SSO OIDC",
+    "contributor": "",
+    "description": "Update FIPS endpoints in aws-us-gov."
+}