Update actions/checkout action to v7

| datasource  | package          | from   | to     |
| ----------- | ---------------- | ------ | ------ |
| github-tags | actions/checkout | v6.0.3 | v7.0.0 |


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

Author: renovate[bot]

.github/workflows/backward-compatibility-check.yml

@@ -22,7 +22,7 @@ jobs:
 
     steps:
       - name: "Checkout"
-        uses: actions/checkout@v6
+        uses: actions/checkout@v7
         with:
           fetch-depth: 0
 

.github/workflows/benchmark.yml

@@ -29,7 +29,7 @@ jobs:
           ini-values: memory_limit=-1, opcache.enable_cli=1, opcache.jit=tracing, opcache.jit_buffer_size=64M
 
       - name: "Checkout base"
-        uses: actions/checkout@v6
+        uses: actions/checkout@v7
         with:
           ref: ${{ github.base_ref }}
 
@@ -41,7 +41,7 @@ jobs:
         run: "vendor/bin/phpbench run tests/Benchmark --progress=none --report=default --tag=base"
 
       - name: "Checkout"
-        uses: actions/checkout@v6
+        uses: actions/checkout@v7
         with:
           clean: false
 

.github/workflows/coding-standard.yml

@@ -26,7 +26,7 @@ jobs:
 
         steps:
             - name: "Checkout"
-              uses: actions/checkout@v6
+              uses: actions/checkout@v7
 
             - name: "Install PHP"
               uses: "shivammathur/setup-php@2.37.2"

.github/workflows/mutation-tests-diff.yml

@@ -22,7 +22,7 @@ jobs:
 
         steps:
             - name: "Checkout"
-              uses: actions/checkout@v6
+              uses: actions/checkout@v7
               with:
                   fetch-depth: 0
 

.github/workflows/mutation-tests.yml

@@ -26,7 +26,7 @@ jobs:
 
         steps:
             - name: "Checkout"
-              uses: actions/checkout@v6
+              uses: actions/checkout@v7
 
             - name: "Install PHP"
               uses: "shivammathur/setup-php@2.37.2"

.github/workflows/phpstan.yml

@@ -26,7 +26,7 @@ jobs:
 
         steps:
             - name: "Checkout"
-              uses: actions/checkout@v6
+              uses: actions/checkout@v7
 
             - name: "Install PHP"
               uses: "shivammathur/setup-php@2.37.2"

.github/workflows/release-on-milestone-closed-triggering-release-event.yml

@@ -18,7 +18,7 @@ jobs:
 
         steps:
             - name: "Checkout"
-              uses: actions/checkout@v6
+              uses: actions/checkout@v7
 
             - name: "Release"
               uses: "laminas/automatic-releases@v1"

.github/workflows/unit.yml

@@ -43,7 +43,7 @@ jobs:
                       composer-options: "--ignore-platform-reqs"
         steps:
             - name: "Checkout"
-              uses: actions/checkout@v6
+              uses: actions/checkout@v7
 
             - name: "Install PHP"
               uses: "shivammathur/setup-php@2.37.2"