Update GitHub Actions to latest versions

- ruby/setup-ruby: v1.245.0 → v1.276.0 (adds Ruby 4.0.0 support)
- astral-sh/setup-uv: v7.1.5 → v7.1.6 (cache key improvements)
- reviewdog/action-actionlint: fix version comment v1.6.8 → v1.69.1

Author: tbhb

.github/workflows/ci.yml

@@ -26,13 +26,13 @@ jobs:
         uses: actions/checkout@8e8c483db84b4bee98b60c0593521ed34d9990e8 # v6.0.1
 
       - name: Set up Ruby
-        uses: ruby/setup-ruby@a4effe49ee8ee5b8b5091268c473a4628afb5651 # v1.245.0
+        uses: ruby/setup-ruby@ae195bbe749a7cef685ac729197124a48305c1cb # v1.276.0
         with:
           ruby-version: "3.2"
           bundler-cache: true
 
       - name: Install uv
-        uses: astral-sh/setup-uv@ed21f2f24f8dd64503750218de024bcf64c7250a # v7.1.5
+        uses: astral-sh/setup-uv@681c641aba71e4a1c380be3ab5e12ad51f415867 # v7.1.6
         with:
           python-version: "3.14"
           enable-cache: true
@@ -58,7 +58,7 @@ jobs:
         run: just lint
 
       - name: Lint GitHub Actions workflows
-        uses: reviewdog/action-actionlint@83e4ed25b168066ad8f62f5afbb29ebd8641d982 # v1.6.8
+        uses: reviewdog/action-actionlint@83e4ed25b168066ad8f62f5afbb29ebd8641d982 # v1.69.1
 
   test:
     name: "Test (Ruby ${{ matrix.ruby-version }})"
@@ -75,13 +75,13 @@ jobs:
         uses: actions/checkout@8e8c483db84b4bee98b60c0593521ed34d9990e8 # v6.0.1
 
       - name: Set up Ruby
-        uses: ruby/setup-ruby@a4effe49ee8ee5b8b5091268c473a4628afb5651 # v1.245.0
+        uses: ruby/setup-ruby@ae195bbe749a7cef685ac729197124a48305c1cb # v1.276.0
         with:
           ruby-version: ${{ matrix.ruby-version }}
           bundler-cache: true
 
       - name: Install uv
-        uses: astral-sh/setup-uv@ed21f2f24f8dd64503750218de024bcf64c7250a # v7.1.5
+        uses: astral-sh/setup-uv@681c641aba71e4a1c380be3ab5e12ad51f415867 # v7.1.6
         with:
           python-version: "3.14"
           enable-cache: true