Use macOS 26 runner (#691)

* Update macOS version in GitHub Actions workflow

* Update macOS version in release workflow

* Update macOS version for nightly workflow

* Fix runner OS for Swift in CodeQL workflow

.github/workflows/codeql.yml

@@ -11,7 +11,7 @@ on:
 jobs:
   analyze:
     name: Analyze (${{ matrix.language }})
-    runs-on: ${{ (matrix.language == 'swift' && 'macos-latest') || 'ubuntu-latest' }}
+    runs-on: ${{ (matrix.language == 'swift' && 'macos-26') || 'ubuntu-latest' }}
     permissions:
       security-events: write
       packages: read

.github/workflows/nightly.yml

@@ -7,7 +7,7 @@ on:
   
 jobs:
   build:
-    runs-on: macos-15
+    runs-on: macos-26
     permissions:
       id-token: write
       contents: write

.github/workflows/release.yml

@@ -8,7 +8,7 @@ jobs:
   test:
     permissions:
         contents: read
-    runs-on: macos-15
+    runs-on: macos-26
     timeout-minutes: 10
     steps:
     - uses: actions/checkout@v5
@@ -32,7 +32,7 @@ jobs:
       id-token: write
       contents: write
       attestations: write
-    runs-on: macos-15
+    runs-on: macos-26
     timeout-minutes: 10
     steps:
     - uses: actions/checkout@v5

.github/workflows/test.yml

@@ -5,7 +5,7 @@ jobs:
   test:
     permissions:
         contents: read
-    runs-on: macos-15
+    runs-on: macos-26
     timeout-minutes: 10
     steps:
     - uses: actions/checkout@v5