Merge pull request #711 from gtk-rs/bilelmoussaoui-patch-2

CI: publish the v0.15 docs

Author: sdroege

.github/workflows/docs.yml

@@ -16,6 +16,7 @@ jobs:
       image: ghcr.io/gtk-rs/gtk3-rs/gtk3:latest
     env:
       RELEASES: |
+        0.15=0.15
         0.14=0.14
         0.9=0.9
     steps: