docs(component-store): fix movies$ observable assignment

[ngfelixl]

PR Checklist

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• The commit message follows our guidelines: https://github.com/ngrx/platform/blob/master/CONTRIBUTING.md#commit

PR Type

What kind of change does this PR introduce?

[ ] Bugfix
[ ] Feature
[ ] Code style update (formatting, local variables)
[ ] Refactoring (no functional changes, no api changes)
[ ] Build related changes
[ ] CI related changes
[x] Documentation content changes
[ ] Other... Please describe:

What is the current behavior?

No changes in the behaviour, just a tiny doc change. The assignment of the movie$ observable was made as a type definition movie$: this.store...., but should be movie$ = this.store....

What is the new behavior?

The assignment is made as movie$ = this.store...

Does this PR introduce a breaking change?

[ ] Yes
[x] No

[ngrxbot]

Preview docs changes for ef614f7 at https://previews.ngrx.io/pr2587-ef614f7e/

[timdeschryver]

Thanks @ngfelixl !

[alex-okrushko]

Thanks! 🙂

[ngfelixl]

I have to thank you, for mentioning me twice at ng-conf because of the router-store schematics implementation.

@timdeschryver, @alex-okrushko Is there anything else I can support you with related to NgRX? Are there any intermediate issues that I could tackle not being labelled as "good-first-issue"? Is there anything I can do to support you besides coding as well?

In order to place me somewhere, it might be good if you get a brief introduction about me: I am a developer focusing on web technologies. A lot of projects I led use Angular, NgRX and RxJS and I also recommend these frameworks for many projects frequently. Regularly I also give trainings for these technologies to our clients. The insight into the frameworks source code could be improved.
Thanks in advance!