Update index.bs

Co-authored-by: Julian Descottes <[email protected]>

Author: sadym-chromium

index.bs

@@ -9530,7 +9530,7 @@ are:
 
    1. Let |user context| be |top-level traversable|'s [=associated user context=].
 
-   1. For each |session| in [=active BiDI sessions=]:
+   1. For each |session| in [=active BiDi sessions=]:
 
       1. If |session|'s [=emulated network conditions=]'s
          [=emulated network conditions/navigable network conditions=]