chore(deps): update docker.io/library/rockylinux docker tag to v9

.gitea/workflows/build.yaml

@@ -3,9 +3,9 @@ name: Build
 on:
   pull_request:
     types:
-    - "opened"
-    - "reopened"
-    - "synchronize"
+    - opened
+    - reopened
+    - synchronize
   push:
     branches:
     - master

.gitea/workflows/markdown-linters.yaml

@@ -0,0 +1,22 @@
+name: 'Lint Markdown files'
+
+on:
+  pull_request:
+    types:
+    - opened
+    - reopened
+    - synchronize
+  push:
+    branches:
+    - master
+  workflow_dispatch: {}
+
+jobs:
+  markdown-lint:
+    runs-on:
+    - ubuntu-latest
+    steps:
+    - uses: actions/checkout@v4.2.2
+    - uses: DavidAnson/markdownlint-cli2-action@v19.1.0
+      with:
+        globs: '**/*.md'

Dockerfile.rockylinux8

@@ -1,4 +1,4 @@
-FROM docker.io/library/rockylinux:8
+FROM docker.io/library/rockylinux:9
 
 RUN dnf update --assumeyes && \
     dnf install --assumeyes bash-completion sudo && \