Fix macOS ARM64 extension release

[mewim]

Now the OpenSSL version has been upgraded to 3.5.0. The outdated OPENSSL_ROOT_DIR causes CMake not able to resolve the path for OpenSSL. I figured that without it CMake can resolve OpenSSL automnatically, so it should be removed.

Vefified by https://github.com/kuzudb/kuzu/actions/runs/16077503113

[Copilot]

Pull Request Overview

This PR removes the hardcoded OPENSSL_ROOT_DIR override so CMake can automatically locate the newly upgraded OpenSSL 3.5.0 on macOS ARM64.

• Dropped the env OPENSSL_ROOT_DIR=… prefix from the build step
• Simplified the make extension-release invocation

Comments suppressed due to low confidence (1)

.github/workflows/build-extensions.yml:57

• [nitpick] Consider adding a comment above this step explaining why the explicit OPENSSL_ROOT_DIR override was removed, so future maintainers understand that CMake now auto-discovers OpenSSL 3.5.0.

        run: make extension-release NUM_THREADS=$(sysctl -n hw.logicalcpu)