build: fix the pypy wheel arguments

This happened:

```
  ********************************************************************************
  The arguments ['--python-tag', 'pp38.pp39.pp310'] were given via `--global-option`.
  Please use `--build-option` instead,
  `--global-option` is reserved for flags like `--verbose` or `--quiet`.

  This deprecation is overdue, please update your project and remove deprecated
  calls to avoid build errors in the future.
  ********************************************************************************
```

.github/workflows/kit.yml

@@ -235,7 +235,7 @@ jobs:
         run: |
           # One wheel works for all PyPy versions. PYVERSIONS
           # yes, this is weird syntax: https://github.com/pypa/build/issues/202
-          pypy3 -m build -w -C="--global-option=--python-tag" -C="--global-option=pp38.pp39.pp310"
+          pypy3 -m build -w -C="--build-option=--python-tag" -C="--build-option=pp38.pp39.pp310"
 
       - name: "List wheels"
         run: |