[TwigBridge] removed superflous ; when rendering form_enctype() (closes #8660)
merged branch fabpot/form_enctype-fix (PR #8731)

This PR was merged into the 2.3 branch.

Discussion
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form_enctype() fix (closes #8660)

| Q             | A
| ------------- | ---
| Bug fix?      | yes
| New feature?  | no
| BC breaks?    | no
| Deprecations? | no
| Tests pass?   | yes
| Fixed tickets | #8660
| License       | MIT
| Doc PR        | n/a

Commits
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572ba68 [TwigBridge] removed superflous ; when rendering form_enctype() (closes #8660)