…template (norkunas)

This PR was merged into the 4.4 branch.

Discussion
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[WebProfilerBundle] Fix closing tag in mailer collector template

| Q             | A
| ------------- | ---
| Branch?       | 4.4
| Bug fix?      | yes
| New feature?  | no
| Deprecations? | no
| Tickets       | -
| License       | MIT
| Doc PR        | -
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Commits
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c2d2e5a Fix closing tag in mailer collector template