Fix release-xcframework failure from non-executable libcurl build script (#4)

* Initial plan

* Invoke libcurl release script with bash

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Co-authored-by: copilot-swe-agent[bot] <198982749+Copilot@users.noreply.github.com>

Author: Copilot

.github/workflows/release.yml

@@ -34,7 +34,7 @@ jobs:
     # headers for the Objectively source dependency. macOS uses system curl.
     - name: Build libcurl.xcframework
       working-directory: Objectively
-      run: ./Frameworks/build-libcurl.sh
+      run: bash ./Frameworks/build-libcurl.sh
 
     - name: Fetch SDL3.xcframework
       working-directory: ObjectivelyGPU