doc: correct the wrong added meta data

PR-URL: https://github.com/nodejs/node/pull/17072
Fixes: https://github.com/nodejs/node/issues/17026
Reviewed-By: James M Snell <jasnell@gmail.com>
Reviewed-By: Myles Borins <myles.borins@gmail.com>

doc/api/async_hooks.md

@@ -76,7 +76,7 @@ function promiseResolve(asyncId) { }
 #### `async_hooks.createHook(callbacks)`
 
 <!-- YAML
-added: v9.0.0
+added: v8.1.0
 -->
 
 * `callbacks` {Object} The [Hook Callbacks][] to register

doc/api/fs.md

@@ -316,7 +316,7 @@ argument to `fs.createReadStream()`. If `path` is passed as a string, then
 <!-- YAML
 added: v0.1.21
 changes:
-  - version: v9.0.0
+  - version: v8.1.0
     pr-url: https://github.com/nodejs/node/pull/13173
     description: Added times as numbers.
 -->

doc/api/http.md

@@ -161,7 +161,7 @@ socket/stream from this function, or by passing the socket/stream to `callback`.
 
 ### agent.keepSocketAlive(socket)
 <!-- YAML
-added: v9.0.0
+added: v8.1.0
 -->
 
 * `socket` {net.Socket}
@@ -181,7 +181,7 @@ it for use with the next request.
 
 ### agent.reuseSocket(socket, request)
 <!-- YAML
-added: v9.0.0
+added: v8.1.0
 -->
 
 * `socket` {net.Socket}

doc/api/zlib.md

@@ -397,7 +397,7 @@ class of the compressor/decompressor classes.
 
 ### zlib.bytesRead
 <!-- YAML
-added: v9.0.0
+added: v8.1.0
 -->
 
 * {number}