Fix the bug that html is encoded in partner_accounts_controller#index.
Fix the bug that html is encoded in partner_accounts_controller#index.

hdyk3118/kozuchi,yakitorii/kozuchi,hdyk3118/kozuchi,ymmtmsys/kozuchi,yakitorii/kozuchi,upinetree/kozuchi,upinetree/kozuchi,everyleaf/kozuchi,everyleaf/kozuchi,everyleaf/kozuchi,ymmtmsys/kozuchi