[#4472] update label text on step form partial

Author: danielabar

app/views/partners/profiles/step/_agency_stability_form.html.erb

@@ -12,7 +12,7 @@
            attachment: profile.proof_of_form_990,
            attachment_name: :proof_of_form_990,
            label_for: "partner_profile_proof_of_form_990",
-           label_text: "Form 990 Filed" %>
+           label_text: "Form 990" %>
 
   <div class="form-group">
     <%= pf.input :program_name, label: "Program Name(s)", class: "form-control" %>