Remove explicit cURL POST (#11)

When executed with `verbose`, cURL logs:
> Note: Unnecessary use of -X or --request, POST is already inferred.

[The `-d`/`--data` flag sends data via
`POST`](https://curl.se/docs/manpage.html#-d) so specifying `POST` _as
well_ is redundant.

Author: JackPGreen

.github/workflows/build-site.yml

@@ -12,4 +12,4 @@ jobs:
     runs-on: ubuntu-latest
     steps:
     - name: Trigger build
-      run: curl -X POST -d {} https://api.netlify.com/build_hooks/6335936e0caff6219afbb0df 
+      run: curl -d {} https://api.netlify.com/build_hooks/6335936e0caff6219afbb0df