addressed == -> === suggestion
minor #9906 [Filesystem] addressed == -> === suggestion (cordoval)

This PR was merged into the 2.3 branch.

Discussion
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[Filesystem] addressed == -> === suggestion

| Q             | A
| ------------- | ---
| Bug fix?      | sort of
| New feature?  | no
| BC breaks?    | no
| Deprecations? | no
| Tests pass?   | yes
| Fixed tickets | none
| License       | MIT
| Doc PR        | na

https://github.com/symfony/symfony/pull/9899/files#r8592132

Commits
-------

0556f71 addressed == -> === suggestion