Fix missing Comma (,)

Yes, I did not validate the last edit to the JSON before commit, sorry
diff --git a/erpnext/accounts/doctype/account/chart_of_accounts/ni_ni_chart_template.json b/erpnext/accounts/doctype/account/chart_of_accounts/ni_ni_chart_template.json
index c35cc13..e7cdf3e 100644
--- a/erpnext/accounts/doctype/account/chart_of_accounts/ni_ni_chart_template.json
+++ b/erpnext/accounts/doctype/account/chart_of_accounts/ni_ni_chart_template.json
@@ -186,7 +186,7 @@
                 "RESULTADOS ACUMULADOS": {
                      "Resultados Acumulados": {
                         "account_type": "Equity"
-                    }
+                    },
                     "Resultados del ejercicio": {
                         "account_type": "Equity"
                     }