test(deps): update macOS workflows to 26 (Tahoe) (cypress-io#1671)

Author: MikeMcC399

.github/workflows/example-basic-pnpm.yml

@@ -14,7 +14,7 @@ jobs:
         os:
           - ubuntu-24.04
           - windows-2025
-          - macos-15
+          - macos-26
     runs-on: ${{ matrix.os }}
     steps:
       - name: Checkout

.github/workflows/example-basic.yml

@@ -22,7 +22,8 @@ jobs:
           - ubuntu-22.04
           - ubuntu-24.04
           - windows-2025
-          - macos-15
+          - macos-26
+          - macos-26-intel
     runs-on: ${{ matrix.os }}
     steps:
       - name: Checkout
@@ -48,7 +49,8 @@ jobs:
           - ubuntu-22.04
           - ubuntu-24.04
           - windows-2025
-          - macos-15
+          - macos-26
+          - macos-26-intel
     runs-on: ${{ matrix.os }}
     steps:
       - name: Checkout

.github/workflows/example-build-artifacts.yml

@@ -45,7 +45,10 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        os: [ubuntu-24.04, windows-2025, macos-15]
+        os:
+          - ubuntu-24.04
+          - windows-2025
+          - macos-26
     runs-on: ${{ matrix.os }}
     steps:
       - name: Checkout