Update actions/checkout to v6. (#2677)

Author: ericproulx

.github/workflows/edge.yml

@@ -16,7 +16,7 @@ jobs:
     env:
       BUNDLE_GEMFILE: ${{ github.workspace }}/gemfiles/${{ matrix.gemfile }}.gemfile
     steps:
-    - uses: actions/checkout@v4
+    - uses: actions/checkout@v6
 
     - name: Set up Ruby
       uses: ruby/setup-ruby@v1

.github/workflows/test.yml

@@ -7,7 +7,7 @@ jobs:
     name: RuboCop
     runs-on: ubuntu-latest
     steps:
-    - uses: actions/checkout@v4
+    - uses: actions/checkout@v6
 
     - name: Set up Ruby
       uses: ruby/setup-ruby@v1
@@ -54,7 +54,7 @@ jobs:
     env:
       BUNDLE_GEMFILE: ${{ github.workspace }}/${{ matrix.gemfile }}
     steps:
-    - uses: actions/checkout@v4
+    - uses: actions/checkout@v6
 
     - name: Set up Ruby
       uses: ruby/setup-ruby@v1

CHANGELOG.md

@@ -23,6 +23,7 @@
 * [#2660](https://github.com/ruby-grape/grape/pull/2660): Fix thread safety: move mutable `ParamsScope` state (`index`, `params_meeting_dependency`) into a per-request `ParamScopeTracker` stored in `Fiber[]` - [@ericproulx](https://github.com/ericproulx).
 * [#2666](https://github.com/ruby-grape/grape/pull/2666): Endpoint cleanup and minor optimizations - [@ericproulx](https://github.com/ericproulx).
 * [#2676](https://github.com/ruby-grape/grape/pull/2676): Exclude ruby 3.2 for rails_edge - [@ericproulx](https://github.com/ericproulx).
+* [#2677](https://github.com/ruby-grape/grape/pull/2677): Update actions/checkout to v6 - [@ericproulx](https://github.com/ericproulx).
 * Your contribution here.
 
 ### 3.1.0 (2026-01-25)