[master] 37a8bebf0 doc: Minor polish of previous commit

[Nils Goroll]

commit 37a8bebf0f7fb0a68af9669af57ff094b8114ee0
Author: Nils Goroll <nils.goroll at uplex.de>
Date:   Fri Feb 21 08:59:22 2025 +0100

    doc: Minor polish of previous commit

diff --git a/doc/sphinx/reference/varnishd.rst b/doc/sphinx/reference/varnishd.rst
index 569edc541..8afe6dde0 100644
--- a/doc/sphinx/reference/varnishd.rst
+++ b/doc/sphinx/reference/varnishd.rst
@@ -350,7 +350,7 @@ The following hash algorithms are available:
 Storage Backend
 ---------------
 
-Multiple storage backend (when the cached and in-flight objects are held) can
+Multiple storage backends (where the cached and in-flight objects are held) can
 be defined, and VCL can pilot which store is used by setting the
 `beresp.storage` variable (see `man vcl-var` for more information).