fix: Wording

Author: linkdotnet

.github/nightly-failed.md

@@ -3,7 +3,7 @@ title: Verification against .NET 7 nightly failed
 labels: input needed
 ---
 
-The nightly build failed against the nightly .NET 7 SDK failed. Please investigate.
+The nightly build failed against the nightly .NET 7 SDK. Please investigate.
 
 ## Additional information