[tailscale] .github: stop using upload-release-asset action

Change to use `action-gh-release` instead of `upload-release-asset` as
the repo for `upload-release-asset` is in public archive and recommends
swapping over to `action-gh-release`.

Updates #47

Signed-off-by: Mario Minardi <mario@tailscale.com>

Author: mpminardi

.github/workflows/build.yml

@@ -109,14 +109,10 @@ jobs:
       with:
         name: ${{ matrix.GOOS }}-${{ matrix.GOARCH }}
     - name: upload artifact
-      uses: actions/upload-release-asset@v1
-      env:
-        GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+      uses: softprops/action-gh-release@c062e08bd532815e2082a85e87e3ef29c3e6d191 # v2.0.8
       with:
-        upload_url: ${{ needs.create_release.outputs.url }}
-        asset_path: ${{ matrix.GOOS }}-${{ matrix.GOARCH }}.tar.gz
-        asset_name: ${{ matrix.GOOS }}-${{ matrix.GOARCH }}.tar.gz
-        asset_content_type: application/gzip
+        files: ${{ matrix.GOOS }}-${{ matrix.GOARCH }}.tar.gz
+        token: ${{ secrets.GITHUB_TOKEN }}
 
   clean_old:
     runs-on: ubuntu-24.04