[openwrt/openwrt] ci: use new buildbot worker images with Debian 11

[LEDE Commits]

ynezz pushed a commit to openwrt/openwrt.git, branch master:
https://git.openwrt.org/1cb8cdbf07236f9d16a4bdd733d5eadd834f6e0c

commit 1cb8cdbf07236f9d16a4bdd733d5eadd834f6e0c
Author: Petr Štetiar <ynezz at true.cz>
AuthorDate: Mon May 15 17:52:16 2023 +0200

    ci: use new buildbot worker images with Debian 11
    
    Debian 10 LTS support ends on 6/2024, so it makes no sense to use it as
    a base for 23.05 release, so lets switch to Debian 11 which should've
    LTS support till 6/2026.
    
    References: https://github.com/openwrt/buildbot/commit/f2744543fa8027117b254ba2f4fa4366149d5bfb
    Signed-off-by: Petr Štetiar <ynezz at true.cz>
---
 .github/workflows/Dockerfile.tools | 2 +-
 .github/workflows/build-tools.yml  | 2 +-
 2 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/.github/workflows/Dockerfile.tools b/.github/workflows/Dockerfile.tools
index a380475044..df5892618a 100644
--- a/.github/workflows/Dockerfile.tools
+++ b/.github/workflows/Dockerfile.tools
@@ -1,4 +1,4 @@
-FROM registry.gitlab.com/openwrt/buildbot/buildworker-3.4.1
+FROM ghcr.io/openwrt/buildbot/buildworker-v3.8.0:v2
 
 COPY --chown=buildbot staging_dir/host /prebuilt_tools/staging_dir/host
 COPY --chown=buildbot build_dir/host /prebuilt_tools/build_dir/host
diff --git a/.github/workflows/build-tools.yml b/.github/workflows/build-tools.yml
index 1507b0b056..9b865f2608 100644
--- a/.github/workflows/build-tools.yml
+++ b/.github/workflows/build-tools.yml
@@ -13,7 +13,7 @@ jobs:
   build:
     name: Build tools
     runs-on: ubuntu-latest
-    container: registry.gitlab.com/openwrt/buildbot/buildworker-3.4.1
+    container: ghcr.io/openwrt/buildbot/buildworker-v3.8.0:v2
 
     steps:
       - name: Checkout