Fix typo in delegate name

Author: nickie

delegates.txt

@@ -390,7 +390,7 @@ Nebojša Ćirić (NC)
 Nicholas Yang (NLY)
 Nicolò Ribaudo (NRO)
 Niko Matsakis (NM)
-Nikolaus Papaspyrou (NPU)
+Nikolaos Papaspyrou (NPU)
 Noah Tye (NTE)
 Norbert Lindenberg (NL)
 Oliver Hunt (OH)