Update custom-blocks.styl

Author: franklinqin0

packages/vuepress-theme-reco/styles/custom-blocks.styl

@@ -10,17 +10,17 @@
   &.tip
     background-color var(--code-color)
     border-color #67cc86
-    .custom-block-title
+    .title
       color #67cc86
   &.warning
     background-color var(--code-color)
     border-color #fb9b5f
-    .custom-block-title
+    .title
       color #fb9b5f
   &.danger
     background-color var(--code-color)
     border-color #f26d6d
-    .custom-block-title
+    .title
       color #f26d6d
   &.right
     color transparentify($textColor, 0.4)