Update .drone.yml

Changed image to rust:alpine

We don't have to specifically build for rust 1.66.1 (what RL9 currently uses), since we can build it with a runner and deploy the runner, with all libraries statically linked.

.drone.yml

@@ -1,28 +1,28 @@
-kind: pipeline
-name: test-on-amd64
-
-platform:
-  arch: amd64
-
-steps:
-- name: test
-  image: rust:1.66.1-alpine
-  commands:
-  - rustc --version
-  - cargo --version
-  - cargo test --verbose --all
-
----
-kind: pipeline
-name: test-on-arm64
-
-platform:
-  arch: arm64
-
-steps:
-- name: test
-  image: rust:1.66.1-alpine
-  commands:
-  - rustc --version
-  - cargo --version
+kind: pipeline
+name: test-on-amd64
+
+platform:
+  arch: amd64
+
+steps:
+- name: test
+  image: rust:alpine
+  commands:
+  - rustc --version
+  - cargo --version
+  - cargo test --verbose --all
+
+---
+kind: pipeline
+name: test-on-arm64
+
+platform:
+  arch: arm64
+
+steps:
+- name: test
+  image: rust:alpine
+  commands:
+  - rustc --version
+  - cargo --version
   - cargo test --verbose --all