Update uexUmeng.md
Update uexUmeng.md

添加config.xml中的配置说明
AppCanOpenSource/appcan-docs-v2,AppCanOpenSource/appcan-docs-v2,sandy1108/appcan-docs-v2,shangxianjing/appcan-docs-v2,pingping-jiang6141/appcan-docs-v2,sandy1108/appcan-docs-v2,AppCanOpenSource/appcan-docs-v2,shangxianjing/appcan-docs-v2,pingping-jiang6141/appcan-docs-v2,shangxianjing/appcan-docs-v2,pingping-jiang6141/appcan-docs-v2,shangxianjing/appcan-docs-v2,sandy1108/appcan-docs-v2,xurigan/appcan-docs-v2,xurigan/appcan-docs-v2,sandy1108/appcan-docs-v2,pingping-jiang6141/appcan-docs-v2,AppCanOpenSource/appcan-docs-v2