fixed docs

Author: hunterliu1003

README.md

@@ -186,7 +186,7 @@ export default {
       show: false
     }),
     mounted () {
-        this.$modal.show('example')
+        this.$vfm.show('example')
     }
 }
 </script>
@@ -211,7 +211,7 @@ export default {
       show: true
     }),
     mounted () {
-        this.$modal.hide('example')
+        this.$vfm.hide('example')
     }
 }
 </script>

docs/content/en/index.md

@@ -204,7 +204,7 @@ export default {
       show: false
     }),
     mounted () {
-        this.$modal.show('example')
+        this.$vfm.show('example')
     }
 }
 </script>
@@ -229,7 +229,7 @@ export default {
       show: true
     }),
     mounted () {
-        this.$modal.hide('example')
+        this.$vfm.hide('example')
     }
 }
 </script>