encryption: fix config template
## type = "file"
## path = "/path/to/master/key/file"
##
-[security.encryption.master-key]
+# [security.encryption.master-key]
# type = "plaintext"
## Specifies the old master key when rotating master key. Same config format as master-key.
## The key is only access once during TiKV startup, after that TiKV do not need access to the key.
## And it is okay to leave the stale previous-master-key config after master key rotation.
-[security.encryption.previous-master-key]
+# [security.encryption.previous-master-key]
# type = "plaintext"
[import]
