Text could be found in one of these:

--message catalog
select descrlong from PSMSGCATDEFN where descrlong like '%appropriate action%'



-- message text
select hr_sstext_text from ps_HR_SSTEXT_TEXT where hr_sstext_text like '%appropriate action%'


-- workflow template
select WL_TEMPLATE_ID from ps_WL_TEMPLATE_GEN where WL_MSG_TXT like '%appropriate action%'