[buildbot] docker,worker: install zstd

[LEDE Commits]

ynezz pushed a commit to buildbot.git, branch master:
https://git.openwrt.org/1eb8aec7a64e57e370791cacea2025a343df746d

commit 1eb8aec7a64e57e370791cacea2025a343df746d
Author: Paul Spooren <mail at aparcar.org>
AuthorDate: Tue Nov 14 12:27:08 2023 +0100

    docker,worker: install zstd
    
    Faster compression with partly better rates. Should be used eventually
    for ImageBuilders etc.
    
    Signed-off-by: Paul Spooren <mail at aparcar.org>
---
 docker/buildworker/Dockerfile | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/docker/buildworker/Dockerfile b/docker/buildworker/Dockerfile
index 6008cdb..a81c35b 100644
--- a/docker/buildworker/Dockerfile
+++ b/docker/buildworker/Dockerfile
@@ -38,7 +38,8 @@ RUN \
 		subversion \
 		swig \
 		unzip \
-		wget && \
+		wget \
+		zstd && \
 	apt-get clean && \
 	localedef -i en_US -c -f UTF-8 -A /usr/share/locale/locale.alias en_US.UTF-8