ci: use apify/actions/pr-title-check wrapper for PR title checks (#95)

## What

Replaces the direct `amannn/action-semantic-pull-request` usage in our
PR-title workflow with the shared `apify/actions/pr-title-check@v1.3.0`
wrapper.

## Why

We're consolidating PR-title checking across the org behind a single
wrapper action
([apify/actions/pr-title-check](https://github.com/apify/actions/tree/main/pr-title-check)).
Benefits:

- One place to pin/update the underlying action version (no more
per-repo version drift — we currently have v4.5.0, v5.5.3, v6, v6.1.1
scattered across repos).
- The wrapper also spell-checks the PR title via
[`crate-ci/typos`](https://github.com/crate-ci/typos).

## Changes

- Swapped the `amannn/action-semantic-pull-request@<version>` step for
`apify/actions/pr-title-check@v1.3.0`.
- Dropped the manual `GITHUB_TOKEN` env wiring; the wrapper defaults to
`github.token`.

## Note

This adds a PR-title spell-check that wasn't running before. The
spell-checker reads a **`_typos.toml` that lives in this repository** —
it's local to this repo, not a shared/org-wide config, so you have full
control over it. If the check produces false positives, just add the
offending words (or rules) to `_typos.toml` in this repo. If no
`_typos.toml` is present, the [typos
defaults](https://github.com/crate-ci/typos) apply.

Author: janbuchar

.github/workflows/on_pull_request.yaml

@@ -12,9 +12,7 @@ jobs:
         name: PR title check
         runs-on: ubuntu-latest
         steps:
-            - uses: amannn/action-semantic-pull-request@v6.1.1
-              env:
-                  GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+            - uses: apify/actions/pr-title-check@v1.3.0
 
     code_checks:
         name: Code checks