build(deps): bump go.einride.tech/sage from 0.152.2 to 0.155.0 in /.sage

Bumps [go.einride.tech/sage](https://github.com/einride/sage) from 0.152.2 to 0.155.0.
- [Release notes](https://github.com/einride/sage/releases)
- [Commits](einride/sage@v0.152.2...v0.155.0)

---
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 v0.152.2
+require go.einride.tech/sage v0.155.0

.sage/go.sum

@@ -1,2 +1,2 @@
-go.einride.tech/sage v0.152.2 h1:PCdLH/vDPN4pM6x1VoQjBIuiMqNoW8YR1fLIwqtDS5M=
-go.einride.tech/sage v0.152.2/go.mod h1:EzV5uciFX7/2ho8EKB5K9JghOfXIxlzs694b+Tkl5GQ=
+go.einride.tech/sage v0.155.0 h1:7zhFgJPE3tP76wgW8otEaMvLj+V+aTqcX/ZT6XhQy0k=
+go.einride.tech/sage v0.155.0/go.mod h1:EzV5uciFX7/2ho8EKB5K9JghOfXIxlzs694b+Tkl5GQ=

Makefile

@@ -4,13 +4,13 @@
 .DEFAULT_GOAL := all
 
 cwd := $(dir $(realpath $(firstword $(MAKEFILE_LIST))))
-sagefile := $(cwd)/.sage/bin/sagefile
+sagefile := $(abspath $(cwd)/.sage/bin/sagefile)
 
 # Setup Go.
 go := $(shell command -v go 2>/dev/null)
 ifndef go
 SAGE_GO_VERSION ?= 1.18.4
-export GOROOT := $(cwd)/.sage/tools/go/$(SAGE_GO_VERSION)/go
+export GOROOT := $(abspath $(cwd)/.sage/tools/go/$(SAGE_GO_VERSION)/go)
 export PATH := $(PATH):$(GOROOT)/bin
 go := $(GOROOT)/bin/go
 os := $(shell uname | tr '[:upper:]' '[:lower:]')