Update actions/cache action to v6

| datasource  | package       | from   | to     |
| ----------- | ------------- | ------ | ------ |
| github-tags | actions/cache | v5.1.0 | v6.1.0 |


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

Author: renovate[bot]

.github/workflows/format_php.yml

@@ -36,23 +36,23 @@ jobs:
           echo "::set-output name=dir::$(composer config cache-files-dir)"
 
       - name: Retrieve Composer’s cache
-        uses: actions/cache@27d5ce7f107fe9357f9df03efb73ab90386fccae # v5
+        uses: actions/cache@55cc8345863c7cc4c66a329aec7e433d2d1c52a9 # v6
         with:
           path: ${{ steps.composer-cache.outputs.dir }}
           key: ${{ runner.os }}-composer-${{ hashFiles('**/composer.json') }}
           restore-keys: |
             ${{ runner.os }}-composer-
 
       - name: Retrieve PHP-CS-Fixer’s cache
-        uses: actions/cache@27d5ce7f107fe9357f9df03efb73ab90386fccae # v5
+        uses: actions/cache@55cc8345863c7cc4c66a329aec7e433d2d1c52a9 # v6
         with:
           path: .php-cs-fixer.cache
           key: ${{ runner.os }}-php-cs-fixer-${{ hashFiles('.php-cs-fixer.php') }}
           restore-keys: |
             ${{ runner.os }}-php-cs-fixer-
 
       - name: Retrieve PHPCS’s cache
-        uses: actions/cache@27d5ce7f107fe9357f9df03efb73ab90386fccae # v5
+        uses: actions/cache@55cc8345863c7cc4c66a329aec7e433d2d1c52a9 # v6
         with:
           path: .phpcs.cache
           key: ${{ runner.os }}-phpcs-${{ hashFiles('phpcs.xml') }}

.github/workflows/psalm.yml

@@ -20,7 +20,7 @@ jobs:
           coverage: none
 
       - name: Cache composer dependencies
-        uses: actions/cache@27d5ce7f107fe9357f9df03efb73ab90386fccae # v5
+        uses: actions/cache@55cc8345863c7cc4c66a329aec7e433d2d1c52a9 # v6
         with:
           path: vendor
           key: composer-${{ hashFiles('composer.json') }}

.github/workflows/run-tests.yml

@@ -60,7 +60,7 @@ jobs:
           node-version: 24
 
       - name: Cache yarn dependencies
-        uses: actions/cache@27d5ce7f107fe9357f9df03efb73ab90386fccae # v5
+        uses: actions/cache@55cc8345863c7cc4c66a329aec7e433d2d1c52a9 # v6
         id: npm-node_modules-cache
         with:
           path: node_modules