Update src/foam/mlang/expr/DateGroupingExpr.js
Update src/foam/mlang/expr/DateGroupingExpr.js

Co-authored-by: Scott Head <5a9162c1b0d984fb233cd0a6334cf2f3a8c223c2@users.noreply.github.com>
jacksonic/vjlofvhjfgm,foam-framework/foam2,foam-framework/foam2,jacksonic/vjlofvhjfgm,foam-framework/foam2,foam-framework/foam2,foam-framework/foam2,jacksonic/vjlofvhjfgm