dep(doc): fixing psych installation on alpine

Author: flavorjones

.github/workflows/ci.yml

@@ -294,10 +294,10 @@ jobs:
         ruby: ${{ fromJSON(needs.ruby_versions.outputs.image_tag) }}
         include:
           # declare docker image for each platform
-          - { platform: aarch64-linux-musl, docker_tag: "-alpine", bootstrap: "apk add build-base &&" }
-          - { platform: arm-linux-musl, docker_tag: "-alpine", bootstrap: "apk add build-base &&" }
-          - { platform: x86-linux-musl, docker_tag: "-alpine", bootstrap: "apk add build-base &&" }
-          - { platform: x86_64-linux-musl, docker_tag: "-alpine", bootstrap: "apk add 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-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 &&" }
           # declare docker platform for each platform
           - { platform: aarch64-linux-gnu, docker_platform: "--platform=linux/arm64" }
           - { platform: aarch64-linux-musl, docker_platform: "--platform=linux/arm64" }
@@ -371,5 +371,5 @@ jobs:
         with:
           name: cruby-x86_64-linux-musl-gem
           path: gems
-      - run: apk add build-base
+      - run: apk add build-base yaml-dev
       - run: ./bin/test-gem-install ./gems