doc: fix YAML syntax errors

PR-URL: #35529
Reviewed-By: James M Snell <[email protected]>
Reviewed-By: Colin Ihrig <[email protected]>
Reviewed-By: Richard Lau <[email protected]>
Reviewed-By: Beth Griggs <[email protected]>

Author: aduh95

doc/api/buffer.md

@@ -1405,7 +1405,9 @@ added:
  - v12.0.0
  - v10.20.0
 changes:
-  - version: v14.10.0
+  - version:
+    - v14.10.0
+    - v12.19.0
     pr-url: https://github.com/nodejs/node/pull/34960
     description: This function is also available as `buf.readBigUint64LE()`.
 -->

doc/api/modules.md

@@ -902,7 +902,9 @@ loading.
 ### `module.parent`
 <!-- YAML
 added: v0.1.16
-deprecated: v14.6.0
+deprecated:
+  - v12.19.0
+  - v14.6.0
 -->
 
 > Stability: 0 - Deprecated: Please use [`require.main`][] and

doc/api/zlib.md

@@ -488,7 +488,9 @@ These advanced options are available for controlling decompression:
 <!-- YAML
 added: v0.11.1
 changes:
-  - version: v14.5.0
+  - version:
+    - v14.5.0
+    - v12.19.0
     pr-url: https://github.com/nodejs/node/pull/33516
     description: The `maxOutputLength` option is supported now.
   - version: v9.4.0