[buildbot] ci: allow pushing of containers during pull requests

[LEDE Commits]

ynezz pushed a commit to buildbot.git, branch master:
https://git.openwrt.org/34103cd918bb558521eec724016a94bc70a953b4

commit 34103cd918bb558521eec724016a94bc70a953b4
Author: Petr Štetiar <ynezz at true.cz>
AuthorDate: Mon May 15 09:25:07 2023 +0200

    ci: allow pushing of containers during pull requests
    
    Make it possible to push containers in pull requests in private forks,
    so the container can be actually runtime tested before merging the
    changes.
    
    Signed-off-by: Petr Štetiar <ynezz at true.cz>
---
 .github/workflows/build-push.yml | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/.github/workflows/build-push.yml b/.github/workflows/build-push.yml
index 451fc87..666c9e3 100644
--- a/.github/workflows/build-push.yml
+++ b/.github/workflows/build-push.yml
@@ -65,14 +65,14 @@ jobs:
 
       - name: Docker meta
         id: meta
-        if: github.event_name != 'pull_request'
+        if: github.event_name != 'pull_request' || github.repository_owner != 'openwrt'
         uses: docker/metadata-action at v4
         with:
           images: name=ghcr.io/${{ github.repository }}/build${{ matrix.container_flavor }}-v${{ env.BUILDBOT_VERSION }}
 
       - name: Login to GitHub Container Registry
         uses: docker/login-action at v2
-        if: github.event_name != 'pull_request'
+        if: github.event_name != 'pull_request' || github.repository_owner != 'openwrt'
         with:
           registry: ghcr.io
           username: ${{ github.actor }}
@@ -80,7 +80,7 @@ jobs:
 
       - name: Build container again and push it
         uses: docker/build-push-action at v4
-        if: github.event_name != 'pull_request'
+        if: github.event_name != 'pull_request' || github.repository_owner != 'openwrt'
         with:
           push: true
           tags: ${{ steps.meta.outputs.tags }}