fix(public-share): basic auth password prefix

fix wrong basic auth password prefix

changelog/unreleased/public-share-auth-middleware.md

@@ -3,4 +3,5 @@ Enhancement: Add a middleware to authenticate public share requests
 Added a new middleware to authenticate public share requests. This makes it possible to use APIs which require an authenticated context with public shares.
 
 https://github.com/owncloud/ocis/pull/2536
+https://github.com/owncloud/ocis/pull/2652
 https://github.com/owncloud/ocis/issues/2479

proxy/pkg/middleware/public_share_auth.go

@@ -9,7 +9,7 @@ import (
 const (
 	headerRevaAccessToken   = "x-access-token"
 	headerShareToken        = "public-token"
-	basicAuthPasswordPrefix = "basic|"
+	basicAuthPasswordPrefix = "password|"
 	authenticationType      = "publicshares"
 )