build(deps): bump go.einride.tech/sage from 0.237.1 to 0.239.0 in /.sage

Bumps [go.einride.tech/sage](https://github.com/einride/sage) from 0.237.1 to 0.239.0.
- [Release notes](https://github.com/einride/sage/releases)
- [Commits](einride/sage@v0.237.1...v0.239.0)

---
updated-dependencies:
- dependency-name: go.einride.tech/sage
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <support@github.com>

.sage/go.mod

@@ -2,4 +2,4 @@ module sage
 
 go 1.17
 
-require go.einride.tech/sage v0.237.1
+require go.einride.tech/sage v0.239.0

.sage/go.sum

@@ -1,2 +1,2 @@
-go.einride.tech/sage v0.237.1 h1:HHiPza0iIhlVUV6TlOAT3j5TjgfH+djqznipty1Tpn4=
-go.einride.tech/sage v0.237.1/go.mod h1:EzV5uciFX7/2ho8EKB5K9JghOfXIxlzs694b+Tkl5GQ=
+go.einride.tech/sage v0.239.0 h1:pqzZWbHPI+FV34uCU+ND7IYku8N1f88NYcrMfZ8L0aA=
+go.einride.tech/sage v0.239.0/go.mod h1:EzV5uciFX7/2ho8EKB5K9JghOfXIxlzs694b+Tkl5GQ=