minor #50463 [7.0] Enable sigchild tests (nicolas-grekas)

This PR was merged into the 7.0 branch.

Discussion
----------

[7.0] Enable sigchild tests

| Q             | A
| ------------- | ---
| Branch?       | 7.0
| Bug fix?      | no
| New feature?  | no
| Deprecations? | no
| Tickets       | -
| License       | MIT
| Doc PR        | -

Thanks `@derrabus` for shipping the binary!

Commits
-------

b648b31 [7.0] Enable sigchild tests

.github/workflows/unit-tests.yml

@@ -228,12 +228,12 @@ jobs:
             script -e -c './phpunit --group tty' /dev/null
 
       - name: Run tests with SIGCHLD enabled PHP
-        if: "false && matrix.php == '8.2' && ! matrix.mode"
+        if: "matrix.php == '8.2' && ! matrix.mode"
         run: |
           mkdir build
           cd build
-          wget -q https://github.com/symfony/binary-utils/releases/download/v0.1/php-8.2.6-pcntl-sigchild.tar.bz2
-          tar -xjf php-8.2.6-pcntl-sigchild.tar.bz2
+          wget -q https://github.com/symfony/binary-utils/releases/download/v0.1/php-8.2.0-pcntl-sigchild.tar.bz2
+          tar -xjf php-8.2.0-pcntl-sigchild.tar.bz2
           cd ..
 
           ./build/php/bin/php ./phpunit --colors=always src/Symfony/Component/Process