[DOP-29772] Fix KeycloakAuthProvider docs #1440

Job	Run time
Oracle tests / Run Oracle tests	7m 46s
Clickhouse tests / Run Clickhouse tests	8m 27s
MySQL tests / Run MySQL tests	9m 0s
Unit tests / Run unit tests	6m 47s
Scheduler tests / Run Scheduler tests	5m 59s
SFTP tests / Run SFTP tests	8m 26s
HDFS tests / Run HDFS tests	11m 52s
MSSQL tests / Run MSSQL tests	7m 16s
FTP tests / Run FTP tests	11m 6s
Hive tests / Run Hive tests	7m 53s
WebDAV tests / Run WebDAV tests	7m 21s
S3 tests / Run S3 tests	11m 13s
Samba tests / Run Samba tests	7m 51s
FTPS tests / Run FTPS tests	7m 28s
Tests done	18s
	1h 58m 43s

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