docs(color-picker): change 'enable alpha selection' to 'support alpha selection' in API description (#3819)

Author: IKEYCY

examples/sites/demos/apis/color-picker.js

@@ -10,7 +10,7 @@ export default {
           type: 'boolean',
           defaultValue: 'false',
           desc: {
-            'zh-CN': '是否启用alpha选择',
+            'zh-CN': '是否支持透明度选择',
             'en-US': 'enable alpha select or not'
           },
           mode: ['pc'],

examples/sites/demos/apis/color-select-panel.js

@@ -10,7 +10,7 @@ export default {
           type: 'boolean',
           defaultValue: 'false',
           desc: {
-            'zh-CN': '是否启用alpha选择',
+            'zh-CN': '是否支持透明度选择',
             'en-US': 'enable alpha select or not'
           },
           mode: ['pc'],

examples/sites/demos/pc/app/color-picker/webdoc/color-picker.js

@@ -46,11 +46,11 @@ export default {
     {
       demoId: 'enable-alpha',
       name: {
-        'zh-CN': 'Alpha',
+        'zh-CN': '透明度',
         'en-US': 'Alpha'
       },
       desc: {
-        'zh-CN': '<code>Alpha</code>选择。',
+        'zh-CN': '<code>透明度</code>选择。',
         'en-US': '<code>Alpha</code>select.'
       },
       codeFiles: ['alpha.vue']