Update tidb-configuration-file.md (#3736)

tidb-configuration-file.md

@@ -459,13 +459,13 @@ This section introduces configuration items related to the Coprocessor Cache fea
 ### `capacity-mb`
 
 - The total size of the cached data. When the cache space is full, old cache entries are evicted.
-- Default value: `1000`
+- Default value: `1000.0`
 - Unit: MB
 
 ### `admission-max-result-mb`
 
 - Specifies the largest single push-down calculation result set that can be cached. If the result set of a single push-down calculation returned on the Coprocessor is larger than the result set specified by this parameter, the result set is cached. Increasing this value means that more types of push-down requests are cached, but also cause the cache space to be occupied more easily. Note that the size of each push-down calculation result set is generally smaller than the size of the Region. Therefore, it is meaningless to set this value far beyond the size of a Region.
-- Default value: `10`
+- Default value: `10.0`
 - Unit: MB
 
 ### `admission-min-process-ms`