ci: musl containers also need linux-headers for ffi

Author: flavorjones

.github/workflows/native-gem-precompilation.yml

@@ -125,9 +125,9 @@ jobs:
         ruby: ["3.3", "3.4", "4.0"]
         include:
           # musl platforms need alpine image and build-base
-          - { platform: aarch64-linux-musl, docker_tag: "-alpine", bootstrap: "apk add build-base yaml-dev &&" }
-          - { platform: arm-linux-musl, docker_tag: "-alpine", bootstrap: "apk add build-base yaml-dev &&" }
-          - { platform: x86_64-linux-musl, docker_tag: "-alpine", bootstrap: "apk add build-base yaml-dev &&" }
+          - { platform: aarch64-linux-musl, docker_tag: "-alpine", bootstrap: "apk add build-base linux-headers yaml-dev &&" }
+          - { platform: arm-linux-musl, docker_tag: "-alpine", bootstrap: "apk add build-base linux-headers yaml-dev &&" }
+          - { platform: x86_64-linux-musl, docker_tag: "-alpine", bootstrap: "apk add build-base linux-headers yaml-dev &&" }
           # docker platform for each platform
           - { platform: aarch64-linux-gnu, runner: ubuntu-24.04-arm, docker_platform: "--platform=linux/arm64" }
           - { platform: aarch64-linux-musl, runner: ubuntu-24.04-arm, docker_platform: "--platform=linux/arm64" }