Update actions/checkout action to v7 (#7776)

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

Author: renovate[bot]

.github/workflows/ci.yml

@@ -50,7 +50,7 @@ jobs:
   ci_info:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v6
+      - uses: actions/checkout@v7
         with:
           set-safe-directory: true
           # Unlimited history for contributors.tex generation.
@@ -70,7 +70,7 @@ jobs:
       image: mdernst/cf-ubuntu-jdk17:latest
     timeout-minutes: 70
     steps:
-      - uses: actions/checkout@v6
+      - uses: actions/checkout@v7
         with:
           set-safe-directory: true
           fetch-depth: 25
@@ -88,7 +88,7 @@ jobs:
       image: mdernst/cf-ubuntu-jdk21:latest
     timeout-minutes: 70
     steps:
-      - uses: actions/checkout@v6
+      - uses: actions/checkout@v7
         with:
           set-safe-directory: true
           fetch-depth: 25
@@ -102,7 +102,7 @@ jobs:
       image: mdernst/cf-ubuntu-jdk25:latest
     timeout-minutes: 70
     steps:
-      - uses: actions/checkout@v6
+      - uses: actions/checkout@v7
         with:
           set-safe-directory: true
           fetch-depth: 25
@@ -116,7 +116,7 @@ jobs:
       image: mdernst/cf-ubuntu-jdk25:latest
     timeout-minutes: 70
     steps:
-      - uses: actions/checkout@v6
+      - uses: actions/checkout@v7
         with:
           set-safe-directory: true
           fetch-depth: 25
@@ -134,7 +134,7 @@ jobs:
       image: mdernst/cf-ubuntu-jdk26:latest
     timeout-minutes: 70
     steps:
-      - uses: actions/checkout@v6
+      - uses: actions/checkout@v7
         with:
           set-safe-directory: true
           fetch-depth: 25
@@ -148,7 +148,7 @@ jobs:
     container:
       image: mdernst/cf-ubuntu-jdk25:latest
     steps:
-      - uses: actions/checkout@v6
+      - uses: actions/checkout@v7
         with:
           set-safe-directory: true
           fetch-depth: 25
@@ -168,7 +168,7 @@ jobs:
       image: mdernst/cf-ubuntu-jdk25:latest
     timeout-minutes: 90
     steps:
-      - uses: actions/checkout@v6
+      - uses: actions/checkout@v7
         with:
           set-safe-directory: true
           fetch-depth: 25
@@ -182,7 +182,7 @@ jobs:
       image: mdernst/cf-ubuntu-jdk25:latest
     timeout-minutes: 90
     steps:
-      - uses: actions/checkout@v6
+      - uses: actions/checkout@v7
         with:
           set-safe-directory: true
           fetch-depth: 25
@@ -199,7 +199,7 @@ jobs:
     container:
       image: mdernst/cf-ubuntu-jdk21-plus:latest
     steps:
-      - uses: actions/checkout@v6
+      - uses: actions/checkout@v7
         with:
           set-safe-directory: true
           # Unlimited history for contributors.tex generation.
@@ -219,7 +219,7 @@ jobs:
     container:
       image: mdernst/cf-ubuntu-jdk25-plus:latest
     steps:
-      - uses: actions/checkout@v6
+      - uses: actions/checkout@v7
         with:
           set-safe-directory: true
           # Unlimited history for contributors.tex generation.
@@ -239,7 +239,7 @@ jobs:
     container:
       image: mdernst/cf-ubuntu-jdk26-plus:latest
     steps:
-      - uses: actions/checkout@v6
+      - uses: actions/checkout@v7
         with:
           set-safe-directory: true
           # Unlimited history for contributors.tex generation.
@@ -261,7 +261,7 @@ jobs:
     container:
       image: mdernst/cf-ubuntu-jdk25:latest
     steps:
-      - uses: actions/checkout@v6
+      - uses: actions/checkout@v7
         with:
           set-safe-directory: true
           fetch-depth: 0
@@ -274,7 +274,7 @@ jobs:
     container:
       image: mdernst/cf-ubuntu-jdk25:latest
     steps:
-      - uses: actions/checkout@v6
+      - uses: actions/checkout@v7
         with:
           set-safe-directory: true
           fetch-depth: 0
@@ -294,7 +294,7 @@ jobs:
       image: mdernst/cf-ubuntu-jdk25:latest
     timeout-minutes: 70
     steps:
-      - uses: actions/checkout@v6
+      - uses: actions/checkout@v7
         with:
           set-safe-directory: true
           fetch-depth: 25
@@ -310,7 +310,7 @@ jobs:
     container:
       image: mdernst/cf-ubuntu-jdk25:latest
     steps:
-      - uses: actions/checkout@v6
+      - uses: actions/checkout@v7
         with:
           set-safe-directory: true
           fetch-depth: 25