github wf: replace deprecated 'set-output' command

The  command is deprecated and will be disabled soon. Please upgrade to using Environment Files. For more information see: https://github.blog/changelog/2022-10-11-github-actions-deprecating-save-state-and-set-output-commands/

.github/workflows/codeigniter.yml

@@ -35,7 +35,7 @@ jobs:
           mysql root password: password # Required if "mysql user" is empty, default is empty. The root superuser password
       - name: Get composer cache directory
         id: composer-cache
-        run: echo "::set-output name=dir::$(composer config cache-files-dir)"
+        run: echo "dir=$(composer config cache-files-dir)" >> $GITHUB_OUTPUT
       - name: Cache composer dependencies
         uses: actions/cache@v3
         with:
@@ -78,7 +78,7 @@ jobs:
           coverage: xdebug #optional
       - name: Get composer cache directory
         id: composer-cache
-        run: echo "::set-output name=dir::$(composer config cache-files-dir)"
+        run: echo "dir=$(composer config cache-files-dir)" >> $GITHUB_OUTPUT
       - name: Cache composer dependencies
         uses: actions/cache@v3
         with:
@@ -136,7 +136,7 @@ jobs:
           coverage: xdebug #optional
       - name: Get composer cache directory
         id: composer-cache
-        run: echo "::set-output name=dir::$(composer config cache-files-dir)"
+        run: echo "dir=$(composer config cache-files-dir)" >> $GITHUB_OUTPUT
       - name: Cache composer dependencies
         uses: actions/cache@v3
         with: