fix name

it has an i

ships/alliance_chieftain.json

@@ -1,9 +1,9 @@
 {
-  "alliance_chieftan": {
+  "alliance_chieftain": {
     "edID": 128816574,
     "eddbID": 12,
     "properties": {
-      "name": "Alliance Chieftan",
+      "name": "Alliance Chieftain",
       "manufacturer": "Lakon",
       "class": 2,
       "hullCost": 17007927,

ships/index.js

@@ -1,6 +1,6 @@
 module.exports = {
   adder: require('./adder').adder,
-  alliance_chieftan: require('./alliance_chieftan').alliance_chieftan,
+  alliance_chieftain: require('./alliance_chieftain').alliance_chieftain,
   anaconda: require('./anaconda').anaconda,
   asp: require('./asp').asp,
   asp_scout: require('./asp_scout').asp_scout,