[openwrt/openwrt] README: update routing.git URL

[LEDE Commits]

aparcar pushed a commit to openwrt/openwrt.git, branch openwrt-21.02:
https://git.openwrt.org/78a2aef8d601a49e171c707806658182d5c7c009

commit 78a2aef8d601a49e171c707806658182d5c7c009
Author: Paul Spooren <mail at aparcar.org>
AuthorDate: Sat Jun 12 08:27:16 2021 -1000

    README: update routing.git URL
    
    The routing packages feed moved from `openwrt-routing/packages` to
    `openwrt/routing`, reflect that in the README.
    
    Signed-off-by: Paul Spooren <mail at aparcar.org>
    (cherry picked from commit 0371f401933e8b24ba6add2689098474774d04d6)
---
 README.md | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/README.md b/README.md
index 6bb4d2e913..f4497de3c0 100644
--- a/README.md
+++ b/README.md
@@ -57,8 +57,8 @@ packages to OpenWrt, please find the fitting repository below.
 * [OpenWrt Packages](https://github.com/openwrt/packages): Community repository
   of ported packages.
 
-* [OpenWrt Routing](https://github.com/openwrt-routing/packages): Packages
-  specifically focused on (mesh) routing.
+* [OpenWrt Routing](https://github.com/openwrt/routing): Packages specifically
+  focused on (mesh) routing.
 
 ## Support Information