[processing] fix typo in Add autoincremental layer alg (fix #14892)

Author: alexbruy

python/plugins/processing/algs/qgis/AutoincrementalField.py

@@ -62,7 +62,7 @@ def processAlgorithm(self, progress):
             geom = feat.geometry()
             outFeat.setGeometry(geom)
             attrs = feat.attributes()
-            attrs.append(count)
+            attrs.append(current)
             outFeat.setAttributes(attrs)
             writer.addFeature(outFeat)
         del writer