Update section headers for table name constraints in user guides

 - Changed "Constraints of table names" to "Table name constraints" across multiple versions of user-guide/table-management.md for consistency.

docs/user-guide/table-management.md

@@ -122,7 +122,7 @@ Therefore, it is important to carefully choose your TIME INDEX column before cre
  to time series like [InfluxDB][2].
 - Table options: when creating a table, you can specify a set of table options, click [here](/reference/sql/create.md#table-options) for more details.
 
-### Constraints of table names
+### Table name constraints
 
 GreptimeDB supports a limited set of special characters in table names, but they must adhere to the following constraints:
 - A valid GreptimeDB table name must start with a letter (either lowercase or uppercase) or `-` / `_` / `:`.

versioned_docs/version-0.6/user-guide/table-management.md

@@ -104,7 +104,7 @@ Therefore, it is important to carefully design your data model before creating t
  to time series like [InfluxDB][2].
 - Table options: when creating a table, you can specify a set of table options, click [here](../reference/sql/create.md#table-options) for more details.
 
-### Constraints of table names
+### Table name constraints
 
 GreptimeDB supports a limited set of special characters in table names, but they must adhere to the following constraints:
 - A valid GreptimeDB table name must start with a letter (either lowercase or uppercase) or `-` / `_` / `:`.

versioned_docs/version-0.7/user-guide/table-management.md

@@ -104,7 +104,7 @@ Therefore, it is important to carefully design your data model before creating t
  to time series like [InfluxDB][2].
 - Table options: when creating a table, you can specify a set of table options, click [here](../reference/sql/create.md#table-options) for more details.
 
-### Constraints of table names
+### Table name constraints
 
 GreptimeDB supports a limited set of special characters in table names, but they must adhere to the following constraints:
 - A valid GreptimeDB table name must start with a letter (either lowercase or uppercase) or `-` / `_` / `:`.

versioned_docs/version-0.8/user-guide/table-management.md

@@ -122,7 +122,7 @@ Therefore, it is important to carefully choose your TIME INDEX column before cre
  to time series like [InfluxDB][2].
 - Table options: when creating a table, you can specify a set of table options, click [here](/reference/sql/create.md#table-options) for more details.
 
-### Constraints of table names
+### Table name constraints
 
 GreptimeDB supports a limited set of special characters in table names, but they must adhere to the following constraints:
 - A valid GreptimeDB table name must start with a letter (either lowercase or uppercase) or `-` / `_` / `:`.

versioned_docs/version-0.9/user-guide/table-management.md

@@ -123,7 +123,7 @@ Therefore, it is important to carefully choose your TIME INDEX column before cre
 - Table options: when creating a table, you can specify a set of table options, click [here](/reference/sql/create.md#table-options) for more details.
 
 
-### Constraints of table names
+### Table name constraints
 
 GreptimeDB supports a limited set of special characters in table names, but they must adhere to the following constraints:
 - A valid GreptimeDB table name must start with a letter (either lowercase or uppercase) or `-` / `_` / `:`.