CI: cd dovecot

Author: missytake

.github/workflows/build-staging-deb.yml

@@ -25,6 +25,7 @@ jobs:
 
       - name: build
         run: |
+          cd dovecot
           DEB_BUILD_OPTIONS=nocheck gbp buildpackage --git-no-pristine-tar --git-ignore-branch -us -uc
 
       - name: upload .deb files