Regenerate GitHub Actions workflow

Executed command: sbt githubWorkflowGenerate

Author: dwolla-oss-scala-steward[bot]

.github/workflows/ci.yml

@@ -34,7 +34,7 @@ jobs:
     timeout-minutes: 60
     steps:
       - name: Checkout current branch (full)
-        uses: actions/checkout@v5
+        uses: actions/checkout@v6
         with:
           fetch-depth: 0
 
@@ -94,7 +94,7 @@ jobs:
     runs-on: ${{ matrix.os }}
     steps:
       - name: Checkout current branch (full)
-        uses: actions/checkout@v5
+        uses: actions/checkout@v6
         with:
           fetch-depth: 0
 
@@ -158,7 +158,7 @@ jobs:
     runs-on: ${{ matrix.os }}
     steps:
       - name: Checkout current branch (full)
-        uses: actions/checkout@v5
+        uses: actions/checkout@v6
         with:
           fetch-depth: 0
 
@@ -192,7 +192,7 @@ jobs:
     runs-on: ${{ matrix.os }}
     steps:
       - name: Checkout current branch (fast)
-        uses: actions/checkout@v5
+        uses: actions/checkout@v6
 
       - name: Setup Java (temurin@11)
         id: setup-java-temurin-11