update docs against 6577

Signed-off-by: Nwusongqing <wusongqing@huawei.com>

en/application-dev/reference/apis/js-apis-bundle-Metadata.md

 # Metadata
 
+The **Metadata** module provides the metadata information.
+
 > **NOTE**
 >
 > The initial APIs of this module are supported since API version 9. Newly added APIs will be marked with a superscript to indicate their earliest API version.
 >
-> API version 9 is a canary version for trial use. The APIs of this version may be unstable.
-
-Provides the metadata information.
+>  API version 9 is a canary version for trial use. The APIs of this version may be unstable. 
 
 ## Metadata
 

en/application-dev/reference/apis/js-apis-zlib.md

 # Zip
 
 > **NOTE**
->
+> 
 > The initial APIs of this module are supported since API version 7. Newly added APIs will be marked with a superscript to indicate their earliest API version.
 
 ## Constraints
@@ -136,7 +136,7 @@ zlib.unzipFile(inFile, outFile, options).then((data) => {
 | Name             | Value  | Description                            |
 | ----------------- | ---- | -------------------------------- |
 | MEM_LEVEL_MIN     | 1    | Minimum memory used by the **zip** API during compression.|
-| MEM_LEVEL_MIN     | 9    | Maximum memory used by the **zip** API during compression.|
+| MEM_LEVEL_MAX     | 9    | Maximum memory used by the **zip** API during compression.|
 | MEM_LEVEL_DEFAULT | 8    | Default memory used by the **zip** API during compression.|
 
 ## zip.CompressLevel