Bump joseluisq/rust-linux-darwin-builder from 1.76 to 1.87 in /docker

Bumps joseluisq/rust-linux-darwin-builder from 1.76 to 1.87.

---
updated-dependencies:
- dependency-name: joseluisq/rust-linux-darwin-builder
  dependency-version: '1.87'
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

Author: dependabot[bot]

docker/Dockerfile.builder

@@ -1,6 +1,6 @@
 ARG version=0.0.0
 # setup build image + dependencies
-FROM joseluisq/rust-linux-darwin-builder:1.76@sha256:5091bee3cf2d0f661fa409293ea206bb48f3e4f744c1ad2bcc867938eac6edbd
+FROM joseluisq/rust-linux-darwin-builder:1.87@sha256:54326c5065fdbb342fd395e537d36796534dc9d65c2f605b90c3c8bc1f268c41
 ARG version
 
 COPY scripts/build-setup.sh .