Fix typo in the security configuration

autograde-service/src/main/java/ch/epfl/autograde/config/SecurityConfig.java

@@ -81,7 +81,7 @@ public class SecurityConfig {
                 .formLogin(AbstractHttpConfigurer::disable)
                 .sessionManagement(AbstractHttpConfigurer::disable)
                 .authorizeHttpRequests(auth -> {
-                    auth.requestMatchers("/actuator/heath").permitAll();
+                    auth.requestMatchers("/actuator/health").permitAll();
                     auth.anyRequest().authenticated();
                 })
                 .build();