fix(store): add the missing bracket

[alex-okrushko]

PR Checklist

Please check if your PR fulfills the following requirements:

• The commit message follows our guidelines: https://github.com/ngrx/platform/blob/master/CONTRIBUTING.md#commit
• Tests for the changes have been added (for bug fixes / features)
• Documentation has been added / updated (for bug fixes / features)

PR Type

What kind of change does this PR introduce?

Remove true && which is always true.

add the bracket

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

What is the current behavior?

Closes #

What is the new behavior?

Does this PR introduce a breaking change?

[ ] Yes
[x] No

Other information

[ngrxbot]

Preview docs changes for 75fdc92 at https://previews.ngrx.io/pr1721-75fdc92/

[timdeschryver]

For full coverage a change the invoke function at

platform/modules/store/spec/meta-reducers/immutability_reducer.spec.ts

Line 22 in 27c3668

function invokeReducer(reduce: Function) {

To be

function invokeReducer(reduce: Function) {
      immutabilityCheckMetaReducer((state, action) => {
        reduce(action);
        return state;
      })({}, { type: 'invoke', numbers: [1, 2, 3], fun: function() {} });
}

[ngrxbot]

Preview docs changes for 27c3668 at https://previews.ngrx.io/pr1721-27c3668/

[alex-okrushko]

Done.

[ngrxbot]

Preview docs changes for c84723e at https://previews.ngrx.io/pr1721-c84723e/

[ngrxbot]

Preview docs changes for 1fa74e3 at https://previews.ngrx.io/pr1721-1fa74e3/