build(deps): bump go.einride.tech/mage-tools in /.mage

Bumps [go.einride.tech/mage-tools](https://github.com/einride/mage-tools) from 0.27.0 to 0.28.0.
- [Release notes](https://github.com/einride/mage-tools/releases)
- [Commits](einride/sage@v0.27.0...v0.28.0)

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

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

.mage/go.mod

@@ -4,7 +4,7 @@ go 1.17
 
 require (
 	github.com/magefile/mage v1.12.1
-	go.einride.tech/mage-tools v0.27.0
+	go.einride.tech/mage-tools v0.28.0
 )
 
 require (

.mage/go.sum

@@ -6,7 +6,7 @@ github.com/iancoleman/strcase v0.2.0 h1:05I4QRnGpI0m37iZQRuskXh+w77mr6Z41lwQzuHL
 github.com/iancoleman/strcase v0.2.0/go.mod h1:iwCmte+B7n89clKwxIoIXy/HfoL7AsD47ZCWhYzw7ho=
 github.com/magefile/mage v1.12.1 h1:oGdAbhIUd6iKamKlDGVtU6XGdy5SgNuCWn7gCTgHDtU=
 github.com/magefile/mage v1.12.1/go.mod h1:z5UZb/iS3GoOSn0JgWuiw7dxlurVYTu+/jHXqQg881A=
-go.einride.tech/mage-tools v0.27.0 h1:WHDPcv9Om7p5vM8/KRf+5bWPwnPpT1tNhONTJltWvxc=
-go.einride.tech/mage-tools v0.27.0/go.mod h1:pFpCBZ0U7a6862mks4y6v5xBkT4IhdrcJdEeTEjweMI=
+go.einride.tech/mage-tools v0.28.0 h1:RSCd3tN6WrtSuudwmqiAzjCKfuTpLtE7bLKqTyuMOMU=
+go.einride.tech/mage-tools v0.28.0/go.mod h1:pFpCBZ0U7a6862mks4y6v5xBkT4IhdrcJdEeTEjweMI=
 gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
 gopkg.in/yaml.v3 v3.0.0-20210107192922-496545a6307b/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM=