ci: Don't fail when the slower CI run attempts to create a release

We have two CI tasks competing to create the release. It's fine for the slower
one to fail because the release has already been created, it will continue and
upload the artefacts.

Author: dlespiau

run-release.sh

@@ -24,7 +24,8 @@ echo "==> Creating $tag release"
 run github-release release \
     --user $user \
     --repo $repo \
-    --tag $tag
+    --tag $tag \
+    || true
 
 function upload() {
     file=$1