docs(form-plugin): npm package title and title of README mismatch

[linhub15]

PR Checklist

Please check if your PR fulfills the following requirements:

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

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?

The npm package is @ngxs/form-plugin but the title in README is @ngsx/forms-plugin with an s

Issue Number: N/A

What is the new behavior?

The s is removed so the title matches the npm package

Does this PR introduce a breaking change?

[ ] Yes
[x] No

Other information

[nx-cloud[bot]]

☁️ Nx Cloud Report

CI is running/has finished running commands for commit 2e340dac0bd83106b6e3dbd2cd52c925224ed1c4. As they complete they will appear below. Click to see the status, the terminal output, and the build insights.

📂 See all runs for this CI Pipeline Execution

---

✅ Successfully ran 3 targets

- [`nx run-many --target=test --all --configuration=ci --base=remotes/origin/master --head=HEAD`](https://cloud.nx.app/runs/gHLi8o0vz8) - [`nx run-many --target=lint --all --configuration=ci --base=remotes/origin/master --head=HEAD`](https://cloud.nx.app/runs/iE6FkLQdkT) - [`nx run-many --target=build --all`](https://cloud.nx.app/runs/1NQfJ113vg)

---

Sent with 💌 from NxCloud.

[codeclimate[bot]]

Code Climate has analyzed commit 794eea0f and detected 0 issues on this pull request.

The test coverage on the diff in this pull request is 100.0% (50% is the threshold).

This pull request will bring the total coverage in the repository to 95.5% (0.0% change).

View more on Code Climate.

[bundlemon[bot]]

BundleMon (Integration Projects)

Unchanged files (1)

Status | Path | Size | Limits :------------: | ------------ | :------------: | :------------: :white_check_mark: | Main bundles(Gzip)
_{hello-world-ng15/dist-integration/main.(hash)
.js}
| 63.35KB | +1%

No change in files bundle size

Final result: :white_check_mark:

View report in BundleMon website ➡️

---

Current branch size history | Target branch size history