fix(docs): built-in shortcodes instagram and tweet error

exampleSite/content/posts/theme-documentation-built-in-shortcodes/index.en.md

@@ -111,15 +111,11 @@ The rendered output looks like this:
 
 [Documentation of `instagram`](https://gohugo.io/content-management/shortcodes#instagram)
 
-Example `instagram` input:
-
-```markdown
-{{</* instagram BWNjjyYFxVx hidecaption */>}}
-```
-
-The rendered output looks like this:
-
-{{< instagram BWNjjyYFxVx hidecaption >}}
+{{< admonition question "Instagram’s API was deprecated since October 24th, 2020" >}}
+The instagram-shortcode refers an endpoint of Instagram’s API, that’s deprecated since October 24th, 2020.
+Thus, no images can be fetched from this API endpoint, resulting in an error when the instagram-shortcode is used.
+For more information please have a look at GitHub issue [#7879](https://github.com/gohugoio/hugo/issues/7879).
+{{< /admonition >}}
 
 ## 5 param
 
@@ -146,12 +142,12 @@ The rendered output looks like this:
 Example `tweet` input:
 
 ```markdown
-{{</* tweet 877500564405444608 */>}}
+{{</* tweet user=GoHugoIO id=917359331535966209 */>}}
 ```
 
 The rendered output looks like this:
 
-{{< tweet 877500564405444608 >}}
+{{< tweet user=GoHugoIO id=917359331535966209 >}}
 
 ## 8 vimeo