Use 2.15 NIF

Author: emilsoman

.github/workflows/release.yml

@@ -12,7 +12,7 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        nif: ["2.15", "2.16"]
+        nif: ["2.15"]
         job:
           - { target: aarch64-apple-darwin, os: macos-12 }
           - { target: x86_64-apple-darwin, os: macos-12 }