fix(doc): update according to the review.

Signed-off-by: Electronic-Waste <[email protected]>

Author: Electronic-Waste

docs/en/guides/10-deploy/03-monitor/10-metasrv-metrics.md

@@ -178,8 +178,8 @@ Here's a list of Query metrics captured by Databend.
 | databend_opendal_errors                                         | Counter   | Number of errors and their types encountered in OpenDAL operations.                                                                                          | scheme (the scheme used for the operation, e.g., "s3"), op (the type of operation, e.g., "read"), err (the type of error encountered, e.g., "NotFound") |
 | databend_opendal_request_duration_seconds                       | Histogram | Duration of OpenDAL requests to object storage.                                                                                                              | scheme (the scheme used for the operation, e.g., "s3"), op (the type of operation, e.g., "read")                                                        |
 | databend_opendal_requests                                       | Counter   | Number of various types of requests made using OpenDAL.                                                                                                      | scheme (the scheme used for the request, e.g., "s3"), op (the operation type, e.g., "batch", "list", "presign", "read", "write", "delete", "stat")      |
-| databend_process_cpu_seconds_total                              | Counter   | Total user and system CPU time spent in seconds. | |
-| databend_process_max_fds                                        | Gauge     | Maximum number of open file descriptors allowed. | |
+| databend_process_cpu_seconds_total                              | Counter   | Total CPU time (seconds) used by users and system. | |
+| databend_process_max_fds                                        | Gauge     | Maximum number of open file descriptors. | |
 | databend_process_open_fds                                       | Gauge     | Number of open file descriptors. | |
 | databend_process_resident_memory_bytes                          | Gauge     | Resident memory size in bytes. | |
 | databend_process_start_time_seconds                             | Gauge     | Start time of the process since Unix epoch in seconds. | |