docs(ng-model-options): remove extra quotes in example, incorrect syntax

[jjhampton]

What kind of change does this PR introduce? (Bug fix, feature, docs update, ...)
Docs update - fix incorrect syntax used in example of ng-model-options attribute directive in documentation at https://docs.angularjs.org/api/ng/directive/ngModelOptions

What is the current behavior? (You can also link to an open issue here)
Current docs show quotes are around the attribute name within the element tag:
<div "ng-model-options"="{ debounce: 100 }"

What is the new behavior (if this is a feature change)?
No quotes around the attribute name within the element tag:
<div ng-model-options="{ debounce: 100 }"

Does this PR introduce a breaking change?
No

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[jjhampton]

@googlebot I signed it!

[googlebot]

CLAs look good, thanks!

[googlebot]

CLAs look good, thanks!

[gkalpak]

Good catch! Thx 👍
Can you please update the commit message to follow our guidelines?

[jjhampton]

@gkalpak Thank you for reviewing - I've updated the commit message to follow the guidelines and re-pushed those changes.