[skip ci] Fix some grammar issues of query-coord docs (#11212)

Signed-off-by: min.tian <min.tian.cn@gmail.com>
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min.tian 2021-11-04 13:38:21 +08:00 committed by GitHub
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@ -359,7 +359,7 @@ type GetSegmentInfoResponse struct {
#### 7.5 Collection Replica
$collectionReplica$ contains a in-memory local copy of persistent collections. In common cases, the system has multiple query nodes. Data of a collection will be distributed across all the available query nodes, and each query node's $collectionReplica$ will maintain its own share (only part of the collection).
$collectionReplica$ contains an in-memory local copy of persistent collections. In common cases, the system has multiple query nodes. Data of a collection will be distributed across all the available query nodes, and each query node's $collectionReplica$ will maintain its own share (only part of the collection).
Every replica tracks a value called tSafe which is the maximum timestamp that the replica is up-to-date.
- _Collection_