[FIX] howtos/translations: fix typo in "wainting"

closes #14648

X-original-commit: a1a8ca9
Signed-off-by: Antoine Vandevenne (anv) <[email protected]>

Author: AntoineVDV

content/developer/howtos/translations.rst

@@ -176,8 +176,8 @@ Blocks
 **Do** keep in one block, giving the full context to translators::
 
     # good, allow to change position of the number in the translation
-    _("You have %s invoices wainting") % len(invoices)
-    _.str.sprintf(_t("You have %s invoices wainting"), invoices.length);
+    _("You have %s invoices waiting") % len(invoices)
+    _.str.sprintf(_t("You have %s invoices waiting"), invoices.length);
 
     # good, full sentence is understandable
     _("Reference of the document that generated " + \