gems: update async requirement from ~> 1.31.0 to >= 1.31, < 2.36

Updates the requirements on [async](https://github.com/socketry/async) to permit the latest version.
- [Release notes](https://github.com/socketry/async/releases)
- [Changelog](https://github.com/socketry/async/blob/main/releases.md)
- [Commits](https://github.com/socketry/async/compare/v1.31.0...v2.35.0)

---
updated-dependencies:
- dependency-name: async
  dependency-version: 2.35.0
  dependency-type: direct:production
...

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

.github/workflows/cd.yml

@@ -11,7 +11,7 @@ jobs:
   release-dockerimage:
     runs-on: ubuntu-latest
     steps:
-    - uses: actions/checkout@v5
+    - uses: actions/checkout@v6
 
     - name: Extract dyndnsd version from tag name
       run: |

.github/workflows/ci.yml

@@ -23,7 +23,7 @@ jobs:
         - '3.3'
         - '3.4'
     steps:
-    - uses: actions/checkout@v5
+    - uses: actions/checkout@v6
     - name: Set up Ruby ${{ matrix.ruby-version }}
       uses: ruby/setup-ruby@v1
       with:
@@ -37,7 +37,7 @@ jobs:
   actionlint:
     runs-on: ubuntu-latest
     steps:
-    - uses: actions/checkout@v5
+    - uses: actions/checkout@v6
     - name: Check workflow files
       run: |
         echo "::add-matcher::.github/actionlint-matcher.json"
@@ -50,6 +50,6 @@ jobs:
       image: ghcr.io/renovatebot/renovate
       options: --user root
     steps:
-    - uses: actions/checkout@v5
+    - uses: actions/checkout@v6
     - name: Check Renovate config
       run: renovate-config-validator --strict

.github/workflows/vulnscan.yml

@@ -1,10 +1,9 @@
-# yaml-language-server: $schema=https://json.schemastore.org/github-workflow.json
 ---
 name: vulnscan
 
 on:
   schedule:
-  - cron: '7 4 * * 4'  # weekly on thursday morning
+  - cron: '7 4 1 * *'  # monthly on first day's morning
   workflow_dispatch:
 
 jobs:

docker/Dockerfile

@@ -1,4 +1,4 @@
-FROM alpine:3.22.1
+FROM alpine:3.22.2
 
 EXPOSE 5353 8080
 

docker/ci/Dockerfile

@@ -1,4 +1,4 @@
-FROM alpine:3.22.1
+FROM alpine:3.22.2
 
 EXPOSE 5353 8080
 

dyndnsd.gemspec

@@ -27,7 +27,7 @@ Gem::Specification.new do |s|
 
   s.required_ruby_version = '>= 3.0'
 
-  s.add_dependency 'async', '~> 1.31.0'
+  s.add_dependency 'async', '>= 1.31', '< 2.36'
   s.add_dependency 'async-dns', '~> 1.3.0'
   s.add_dependency 'base64', '~> 0.2.0' # needed for async
   s.add_dependency 'logger', '>= 1.6', '< 1.8'
@@ -46,6 +46,6 @@ Gem::Specification.new do |s|
   s.add_development_dependency 'rspec'
   s.add_development_dependency 'rubocop', '~> 1.81.1'
   s.add_development_dependency 'rubocop-rake', '~> 0.7.1'
-  s.add_development_dependency 'rubocop-rspec', '~> 3.7.0'
+  s.add_development_dependency 'rubocop-rspec', '~> 3.8.0'
   s.add_development_dependency 'solargraph', '~> 0.55.0'
 end