build(deps): bump go.einride.tech/sage from 0.377.1 to 0.377.3 in /.sage

Bumps [go.einride.tech/sage](https://github.com/einride/sage) from 0.377.1 to 0.377.3.
- [Release notes](https://github.com/einride/sage/releases)
- [Commits](einride/sage@v0.377.1...v0.377.3)

---
updated-dependencies:
- dependency-name: go.einride.tech/sage
  dependency-version: 0.377.3
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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

Author: dependabot[bot]

.sage/go.mod

@@ -4,4 +4,4 @@ go 1.23.0
 
 toolchain go1.24.1
 
-require go.einride.tech/sage v0.377.1
+require go.einride.tech/sage v0.377.3

.sage/go.sum

@@ -1,2 +1,2 @@
-go.einride.tech/sage v0.377.1 h1:TrWK4JTt1uI4rUGZrS7z3rzXDuxpds1pycvEc4ZNZ7Y=
-go.einride.tech/sage v0.377.1/go.mod h1:sy9YuK//XVwEZ2wD3f19xVSKEtN8CYtgtBZGpzC3p80=
+go.einride.tech/sage v0.377.3 h1:ed/FHvY5QlRuHTFWwyyi1DfuxOt9A6D3I8q1nARVTfk=
+go.einride.tech/sage v0.377.3/go.mod h1:sy9YuK//XVwEZ2wD3f19xVSKEtN8CYtgtBZGpzC3p80=