Fix templating error with unban permission message
Fix templating error with unban permission message

Fixes https://github.com/matrix-org/synapse/issues/2759

Signed-off-by: Travis Ralston <f36f6a6abc4b55589c96c71fceedf83e596b8f33@gmail.com>
matrix-org/synapse,matrix-org/synapse,matrix-org/synapse,matrix-org/synapse,matrix-org/synapse,matrix-org/synapse