Change "something logic" to "some logic" (#1863)

Author: RohanTalip

src/v2/guide/plugins.md

@@ -58,28 +58,28 @@ A Vue.js plugin should expose an `install` method. The method will be called wit
 MyPlugin.install = function (Vue, options) {
   // 1. add global method or property
   Vue.myGlobalMethod = function () {
-    // something logic ...
+    // some logic ...
   }
 
   // 2. add a global asset
   Vue.directive('my-directive', {
     bind (el, binding, vnode, oldVnode) {
-      // something logic ...
+      // some logic ...
     }
     ...
   })
 
   // 3. inject some component options
   Vue.mixin({
     created: function () {
-      // something logic ...
+      // some logic ...
     }
     ...
   })
 
   // 4. add an instance method
   Vue.prototype.$myMethod = function (methodOptions) {
-    // something logic ...
+    // some logic ...
   }
 }
 ```