chore(deps): bump go.einride.tech/sage from 0.144.0 to 0.155.1 in /.sage

Bumps [go.einride.tech/sage](https://github.com/einride/sage) from 0.144.0 to 0.155.1.
- [Release notes](https://github.com/einride/sage/releases)
- [Commits](einride/sage@v0.144.0...v0.155.1)

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

Signed-off-by: dependabot[bot] <[email protected]>

.sage/go.mod

@@ -2,4 +2,4 @@ module sage
 
 go 1.17
 
-require go.einride.tech/sage v0.144.0
+require go.einride.tech/sage v0.155.1

.sage/go.sum

@@ -1,2 +1,2 @@
-go.einride.tech/sage v0.144.0 h1:lD+zQhJ6ozGoRDkbq7zMo2HCfK2izUo4OYECcEJE5pA=
-go.einride.tech/sage v0.144.0/go.mod h1:EzV5uciFX7/2ho8EKB5K9JghOfXIxlzs694b+Tkl5GQ=
+go.einride.tech/sage v0.155.1 h1:OaIiIXye6dZ/M0XYbwrLDSyaM2GcrzI+qGVj2e+P1Hk=
+go.einride.tech/sage v0.155.1/go.mod h1:EzV5uciFX7/2ho8EKB5K9JghOfXIxlzs694b+Tkl5GQ=

Makefile

@@ -3,13 +3,14 @@
 
 .DEFAULT_GOAL := all
 
-sagefile := .sage/bin/sagefile
+cwd := $(dir $(realpath $(firstword $(MAKEFILE_LIST))))
+sagefile := $(abspath $(cwd)/.sage/bin/sagefile)
 
 # Setup Go.
 go := $(shell command -v go 2>/dev/null)
 ifndef go
 SAGE_GO_VERSION ?= 1.18.4
-export GOROOT := .sage/tools/go/$(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:]')