remove set-output in CI

Author: vincentsarago

.github/workflows/ci.yml

@@ -78,7 +78,8 @@ jobs:
 
       - name: Set module version
         id: module
-        run: echo ::set-output name=version::$(python -c 'from importlib.metadata import version; print(version("geojson_pydantic"))')
+        run: |
+          echo version=$(python -c'import geojson_pydantic; print(geojson_pydantic.__version__)') >> $GITHUB_OUTPUT
 
       - name: Build and publish
         if: steps.tag.outputs.tag == steps.module.outputs.version