ci: update to macos-15

Signed-off-by: Luca Vaccaro <me@lvaccaro.com>

Author: lvaccaro

.github/workflows/bindings.yml

@@ -18,9 +18,9 @@ jobs:
           target: aarch64-unknown-linux-gnu
         - os: ubuntu-22.04
           target: x86_64-unknown-linux-gnu
-        - os: macos-16
+        - os: macos-15
           target: aarch64-apple-darwin
-        - os: macos-16
+        - os: macos-15
           target: x86_64-apple-darwin
         - os: windows-2022
           target: x86_64-pc-windows-msvc
@@ -65,7 +65,7 @@ jobs:
           path: |
             target/${{ matrix.target }}/release/liblwk.dylib
             target/${{ matrix.target }}/release/liblwk.a
-        if:  matrix.os == 'macos-16'
+        if:  matrix.os == 'macos-15'
 
   build-cpp:
     needs: build

.github/workflows/cont_integration.yml

@@ -13,7 +13,7 @@ jobs:
   build-test:
     strategy:
       matrix:
-        os: ["macos-16", "ubuntu-22.04", "windows-2022"]
+        os: ["macos-15", "ubuntu-22.04", "windows-2022"]
     runs-on: ${{ matrix.os }}
     steps:
       - name: Checkout
@@ -37,7 +37,7 @@ jobs:
       - run: nix build .
 
   just-swift: # swift framework is built in the lwk-swift repo, here we care `just swift` doesn't brake
-      runs-on: macos-16
+      runs-on: macos-15
       steps:
         - uses: actions/checkout@v4
         - uses: dtolnay/rust-toolchain@1.85.0

.github/workflows/wheels.yml

@@ -27,7 +27,7 @@ jobs:
   osx-wheels:
     strategy:
       matrix:
-        os: ["macos-16"]
+        os: ["macos-15"]
     runs-on: ${{ matrix.os }}
     steps:
      - uses: actions/checkout@v4