fix(scoped-libs): remove typo in the main property

[dschwank]

The typo in the main property is causing issues while importing the library, as the referenced files
does not exist.

PR Checklist

Please check if your PR fulfills the following requirements:

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

PR Type

What kind of change does this PR introduce?

[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?

The main property in the package.json has a typo, which results in problems for TypeScript, as it can't find the given main file.

Issue Number: N/A

What is the new behavior?

The library can be used with as import in TypeScript without an issue.

Does this PR introduce a breaking change?

[ ] Yes
[x] No

Other information