Update actions/checkout action to v6 (#8563)

Co-authored-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>

Author: renovate[bot]

.github/workflows/changelog.yml

@@ -34,7 +34,7 @@ jobs:
 
     steps:
       - name: Checkout repo
-        uses: actions/checkout@v5
+        uses: actions/checkout@v6
         with:
           fetch-depth: 0
 

.github/workflows/ci.yml

@@ -194,7 +194,7 @@ jobs:
 
     steps:
       - name: Checkout repo
-        uses: actions/checkout@v5
+        uses: actions/checkout@v6
 
       - name: Install toolchain (repo MSRV - tier 1 or 2)
         if: matrix.tier == 1 || matrix.tier == 2
@@ -375,7 +375,7 @@ jobs:
 
     steps:
       - name: Checkout repo
-        uses: actions/checkout@v5
+        uses: actions/checkout@v6
 
       - name: Install core MSRV toolchain
         run: |
@@ -432,7 +432,7 @@ jobs:
 
     steps:
       - name: Checkout repo
-        uses: actions/checkout@v5
+        uses: actions/checkout@v6
 
       - name: Install toolchain
         run: |
@@ -473,7 +473,7 @@ jobs:
 
     steps:
       - name: Checkout repo
-        uses: actions/checkout@v5
+        uses: actions/checkout@v6
 
       - name: Install repo MSRV toolchain
         run: |
@@ -519,7 +519,7 @@ jobs:
 
     steps:
       - name: Checkout repo
-        uses: actions/checkout@v5
+        uses: actions/checkout@v6
 
       - name: Install repo MSRV toolchain
         run: |
@@ -642,7 +642,7 @@ jobs:
 
     steps:
       - name: Checkout repo
-        uses: actions/checkout@v5
+        uses: actions/checkout@v6
 
       - name: Install repo MSRV toolchain
         run: |
@@ -670,7 +670,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Checkout repo
-        uses: actions/checkout@v5
+        uses: actions/checkout@v6
 
       - name: Install repo MSRV toolchain
         run: |
@@ -701,7 +701,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Checkout repo
-        uses: actions/checkout@v5
+        uses: actions/checkout@v6
 
       - name: Install MSRV toolchain
         run: |
@@ -739,7 +739,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Checkout repo
-        uses: actions/checkout@v5
+        uses: actions/checkout@v6
 
       - name: Run `cargo deny check`
         uses: EmbarkStudios/cargo-deny-action@v2
@@ -757,7 +757,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Checkout repo
-        uses: actions/checkout@v5
+        uses: actions/checkout@v6
 
       - name: Run `cargo deny check`
         uses: EmbarkStudios/cargo-deny-action@v2

.github/workflows/cts.yml

@@ -55,7 +55,7 @@ jobs:
 
     steps:
       - name: checkout repo
-        uses: actions/checkout@v5
+        uses: actions/checkout@v6
 
       - name: Install Repo MSRV toolchain
         run: |

.github/workflows/docs.yml

@@ -29,7 +29,7 @@ jobs:
 
     steps:
       - name: Checkout repo
-        uses: actions/checkout@v5
+        uses: actions/checkout@v6
         with:
           persist-credentials: false
 

.github/workflows/generate.yml

@@ -49,7 +49,7 @@ jobs:
     name: "${{ matrix.name }}"
 
     steps:
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
 
       # We can't rely on an override here, as that would only set
       # the toolchain for the current directory, not the newly generated project.

.github/workflows/lazy.yml

@@ -24,7 +24,7 @@ jobs:
     name: "Validate Shaders: Dota2"
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
 
       - run: mkdir naga/data
 
@@ -50,7 +50,7 @@ jobs:
     name: "Validate Shaders: Sascha Willems Vulkan Tutorial"
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
 
       - name: Download shaders
         run: cd naga && git clone https://github.com/SaschaWillems/Vulkan.git
@@ -85,7 +85,7 @@ jobs:
     name: "Validate Shaders: dneto0 spirv-samples"
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
 
       - name: Download shaders
         run: |

.github/workflows/publish.yml

@@ -25,7 +25,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Checkout repo
-        uses: actions/checkout@v5
+        uses: actions/checkout@v6
         with:
           persist-credentials: false
 

.github/workflows/shaders.yml

@@ -25,7 +25,7 @@ jobs:
     name: "Validate: HLSL"
     runs-on: windows-latest
     steps:
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
 
       - name: Debug symbols to `line-tables-only`
         shell: bash
@@ -69,7 +69,7 @@ jobs:
     name: "Validate: MSL"
     runs-on: macos-15
     steps:
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
 
       - name: Debug symbols to line-tables-only
         shell: bash
@@ -91,7 +91,7 @@ jobs:
     name: "Validate: SPIR-V/GLSL/DOT/WGSL"
     runs-on: ubuntu-24.04
     steps:
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
 
       - name: Install Vulkan SDK
         uses: ./.github/actions/install-vulkan-sdk