[hotfix] allow only 5 character in company_abbr field in setup wizard (#9779)

diff --git a/erpnext/public/js/setup_wizard.js b/erpnext/public/js/setup_wizard.js
index f457762..5995a03 100644
--- a/erpnext/public/js/setup_wizard.js
+++ b/erpnext/public/js/setup_wizard.js
@@ -68,13 +68,13 @@
 			slide.get_input("company_name").on("change", function () {
 				var parts = slide.get_input("company_name").val().split(" ");
 				var abbr = $.map(parts, function (p) { return p ? p.substr(0, 1) : null }).join("");
-				slide.get_field("company_abbr").set_input(abbr.slice(0, 5).toUpperCase());
+				slide.get_field("company_abbr").set_value(abbr.slice(0, 5).toUpperCase());
 			}).val(frappe.boot.sysdefaults.company_name || "").trigger("change");
 
 			slide.get_input("company_abbr").on("change", function () {
 				if (slide.get_input("company_abbr").val().length > 5) {
 					frappe.msgprint("Company Abbreviation cannot have more than 5 characters");
-					slide.get_field("company_abbr").set_input("");
+					slide.get_field("company_abbr").set_value("");
 				}
 			});
 		}