Add language slugs (System.Data)

[gewarren]

Prep for dotnet/docs#45892.

(Hide whitespace changes.)

[dotnet-policy-service]

Tagging subscribers to this area: @roji, @ajcvickers

[learn-build-service-prod]

Learn Build status updates of commit d2e8267:

✅ Validation status: passed

File	Status	Preview URL	Details
xml/System.Data.Common.CommandTrees.ExpressionBuilder/DbExpressionBuilder.xml	✅Succeeded	View
xml/System.Data.Common/DbConnectionStringBuilder.xml	✅Succeeded	View
xml/System.Data.Common/DbParameter.xml	✅Succeeded	View
xml/System.Data.EntityClient/EntityConnection.xml	✅Succeeded	View
xml/System.Data.Objects/ObjectQuery`1.xml	✅Succeeded	View
xml/System.Data.Odbc/OdbcConnection.xml	✅Succeeded	View
xml/System.Data.Odbc/OdbcConnectionStringBuilder.xml	✅Succeeded	View
xml/System.Data.Odbc/OdbcParameter.xml	✅Succeeded	View
xml/System.Data.OleDb/OleDbConnection.xml	✅Succeeded	View
xml/System.Data.OleDb/OleDbConnectionStringBuilder.xml	✅Succeeded	View
xml/System.Data.OleDb/OleDbParameter.xml	✅Succeeded	View
xml/System.Data.OracleClient/OracleConnectionStringBuilder.xml	✅Succeeded	View
xml/System.Data.OracleClient/OracleLob.xml	✅Succeeded	View
xml/System.Data.OracleClient/OracleParameter.xml	✅Succeeded	View
xml/System.Data.OracleClient/OracleParameterCollection.xml	✅Succeeded	View
xml/System.Data.SqlClient/SqlClientFactory.xml	✅Succeeded	View
xml/System.Data.SqlClient/SqlConnection.xml	✅Succeeded	View
xml/System.Data.SqlClient/SqlConnectionStringBuilder.xml	✅Succeeded	View
xml/System.Data.SqlClient/SqlParameter.xml	✅Succeeded	View
xml/System.Data.SqlClient/SqlParameterCollection.xml	✅Succeeded	View
xml/System.Data/DataColumn.xml	✅Succeeded	View
xml/System.Data/DataSet.xml	✅Succeeded	View
xml/System.Data/DataTable.xml	✅Succeeded	View

For more details, please refer to the build report.

For any questions, please:

• Try searching the learn.microsoft.com contributor guides
• Post your question in the Learn support channel

[cheenamalhotra]

LGTM