docs: link between global-computed and using-vue (#2697)

Author: lukaw3d

packages/docs/docs/guide/global-computed.md

@@ -1,6 +1,6 @@
 # Global Computed
 
-In VuePress, some core [computed properties](https://vuejs.org/v2/guide/computed.html#Computed-Properties) can be used by the [default theme](../theme/default-theme-config.md) or custom themes.
+In VuePress, some core [computed properties](https://vuejs.org/v2/guide/computed.html#Computed-Properties) can be used by the [default theme](../theme/default-theme-config.md) or custom themes. Or in Markdown pages [using vue](./using-vue.md#access-to-site-page-data).
 
 ## $site
 

packages/docs/docs/guide/using-vue.md

@@ -87,7 +87,7 @@ Directives also work:
 
 ### Access to Site & Page Data
 
-The compiled component does not have any private data but does have access to the [site metadata](../theme/writing-a-theme.md#site-and-page-metadata). For example:
+The compiled component does not have any private data but does have access to the [site metadata](../theme/writing-a-theme.md#site-and-page-metadata) and [computed properties](./global-computed.md). For example:
 
 **Input**