Replace softprops action with gh release create

Use gh CLI directly instead of a third-party action. One fewer
external dependency with the same functionality.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

Author: JAORMX

.github/workflows/release.yaml

@@ -75,14 +75,14 @@ jobs:
           sha256sum propolis-*.tar.gz > sha256sums.txt
 
       - name: Create GitHub Release
-        uses: softprops/action-gh-release@v2
-        with:
-          generate_release_notes: true
-          files: |
-            propolis-runtime-linux-amd64.tar.gz
-            propolis-runtime-linux-arm64.tar.gz
-            propolis-firmware-linux-amd64.tar.gz
-            propolis-firmware-linux-arm64.tar.gz
+        env:
+          GH_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+        run: |
+          gh release create ${{ github.ref_name }} --generate-notes \
+            propolis-runtime-linux-amd64.tar.gz \
+            propolis-runtime-linux-arm64.tar.gz \
+            propolis-firmware-linux-amd64.tar.gz \
+            propolis-firmware-linux-arm64.tar.gz \
             sha256sums.txt
 
   push-oci: