build(deps): bump go.einride.tech/sage from 0.305.0 to 0.306.0 in /.sage

Bumps [go.einride.tech/sage](https://github.com/einride/sage) from 0.305.0 to 0.306.0.
- [Release notes](https://github.com/einride/sage/releases)
- [Commits](einride/sage@v0.305.0...v0.306.0)

---
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 go.einride.tech/pid/.sage
 
 go 1.19
 
-require go.einride.tech/sage v0.305.0
+require go.einride.tech/sage v0.306.0

.sage/go.sum

@@ -1,2 +1,2 @@
-go.einride.tech/sage v0.305.0 h1:TUJekrRnMlkxoyLSoz/aLkeIkQVDxY0nBVJ4OVn9N4U=
-go.einride.tech/sage v0.305.0/go.mod h1:EzV5uciFX7/2ho8EKB5K9JghOfXIxlzs694b+Tkl5GQ=
+go.einride.tech/sage v0.306.0 h1:FjnGGXqA11NJnV11zYhTq+tcMN4vrqMdBeSLnwfSAs0=
+go.einride.tech/sage v0.306.0/go.mod h1:EzV5uciFX7/2ho8EKB5K9JghOfXIxlzs694b+Tkl5GQ=