Fix contributor entry format for Anton Egorushkin

Author: max0x7ba

CONTRIBUTORS.txt

@@ -29,4 +29,5 @@ Contributors:
 - Rene Leonhardt (https://github.com/max0x7ba/atomic_queue/pull/87)
 - Ionut Tomos (https://github.com/max0x7ba/atomic_queue/pull/91)
 - Ionut Tomos (https://github.com/max0x7ba/atomic_queue/pull/92)
-- Anton Egorushkin https://github.com/max0x7ba/atomic_queue/pull/93
+- Anton Egorushkin (https://github.com/max0x7ba/atomic_queue/pull/93)
+