pgsql: doc: Clarify documentation about SSL passphrases

doc: Clarify documentation about SSL passphrases

The previous statement that using a passphrase disables the ability to
change the server's SSL configuration without a server restart was no
longer completely true since the introduction of
ssl_passphrase_command_supports_reload.

Branch
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REL_12_STABLE

Details
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https://git.postgresql.org/pg/commitdiff/4977a35ea79a4608a2617a06bb73488f199d062f

Modified Files
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doc/src/sgml/runtime.sgml | 5 +++--
1 file changed, 3 insertions(+), 2 deletions(-)