chore(deps): update actions/checkout action to v6 (#142)

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

Author: renovate[bot]

.github/workflows/flare-ui.yml

@@ -60,7 +60,7 @@ jobs:
           - { platform: watchOS, name: "watchOS 10.2", xcode: "Xcode_15.2", runsOn: macOS-14, destination: "OS=10.2,name=Apple Watch Series 9 (45mm)", testPlan: "FlareUIUnitTests" }
     steps:
       - name: Checkout code
-        uses: actions/checkout@v5
+        uses: actions/checkout@v6
       - uses: jdx/mise-action@v3
         with:
           experimental: true
@@ -94,7 +94,7 @@ jobs:
           - { name: "macOS 14, SPM 5.10.0", xcode: "Xcode_15.3", runsOn: macOS-14 }
     steps:
       - name: Checkout code
-        uses: actions/checkout@v5
+        uses: actions/checkout@v6
 
       - name: Build with Swift Package Manager - ${{ matrix.name }}
         run: swift build -c release --target FlareUI
@@ -113,7 +113,7 @@ jobs:
           - { platform: tvOS, name: "tvOS 18.4", xcode: "Xcode_16.3", runsOn: macOS-15, destination: "OS=18.4,name=Apple TV", testPlan: "SnapshotTests" }
     steps:
       - name: Checkout code
-        uses: actions/checkout@v5
+        uses: actions/checkout@v6
       - uses: jdx/mise-action@v3
         with:
           experimental: true

.github/workflows/flare.yml

@@ -58,7 +58,7 @@ jobs:
           - { platform: watchOS, name: "watchOS 10.2", xcode: "Xcode_15.2", runsOn: macOS-14, destination: "OS=10.2,name=Apple Watch Series 9 (45mm)", testPlan: "UnitTests", generateProject: true }
     steps:
       - name: Checkout code
-        uses: actions/checkout@v5
+        uses: actions/checkout@v6
       - uses: jdx/mise-action@v3
         with:
           experimental: true
@@ -94,7 +94,7 @@ jobs:
           - { name: "macOS 14, SPM 5.10.0", xcode: "Xcode_15.3", runsOn: macOS-14 }
     steps:
       - name: Checkout code
-        uses: actions/checkout@v5
+        uses: actions/checkout@v6
 
       - name: Build with Swift Package Manager - ${{ matrix.name }}
         run: swift build -c release --target Flare