Update base image and the checkout action.

Author: thomasvl

.github/workflows/cocoapods.yml

@@ -24,14 +24,14 @@ jobs:
   # time, so this covers the Core spec and tests.
   pod-lib-lint-core:
     name: CocoaPods lib lint Core
-    runs-on: macos-15
+    runs-on: macos-26
     strategy:
       fail-fast: false
       matrix:
         pod_configuration: ["Debug", "Release"]
         extra_flags: ["", "--use-static-frameworks"]
     steps:
-    - uses: actions/checkout@v5
+    - uses: actions/checkout@v6
     - name: "iOS, macOS, tvOS, and visionOS"
       run:  |
         pod lib lint --verbose ${{ matrix.extra_flags }} \
@@ -55,13 +55,13 @@ jobs:
   # resources without any real gain.
   pod-lib-lint-subspecs:
     name: CocoaPods lib lint SubSpecs
-    runs-on: macos-15
+    runs-on: macos-26
     strategy:
       fail-fast: false
       matrix:
         pod_configuration: ["Debug", "Release"]
     steps:
-    - uses: actions/checkout@v5
+    - uses: actions/checkout@v6
     - name: "macOS"
       run:  |
         pod lib lint --verbose \

.github/workflows/examples.yml

@@ -31,13 +31,13 @@ on:
 
 jobs:
   examples:
-    runs-on: macos-15
+    runs-on: macos-26
     strategy:
       fail-fast: false
       matrix:
         SAMPLE: ["Calendar", "Drive", "YouTube", "Storage"]
     steps:
-    - uses: actions/checkout@v5
+    - uses: actions/checkout@v6
     - name: Build Debug
       run:  |
         set -eu

.github/workflows/service_generator.yml

@@ -29,27 +29,27 @@ on:
 
 jobs:
   swift:
-    runs-on: macos-15
+    runs-on: macos-26
     strategy:
       fail-fast: false
       matrix:
         CONFIGURATION: ["debug", "release"]
     steps:
-    - uses: actions/checkout@v5
+    - uses: actions/checkout@v6
     - name: Build ServiceGenerator
       run:  |
         set -eu
         cd Tools
         swift build --configuration ${{ matrix.CONFIGURATION }}
 
   xcodebuild:
-    runs-on: macos-15
+    runs-on: macos-26
     strategy:
       fail-fast: false
       matrix:
         CONFIGURATION: ["Debug", "Release"]
     steps:
-    - uses: actions/checkout@v5
+    - uses: actions/checkout@v6
     - name: Build ServiceGenerator
       run:  |
         set -eu

.github/workflows/swiftpm.yml

@@ -24,13 +24,13 @@ on:
 jobs:
   swift:
     # The swift command line only support build/testing for macOS on.
-    runs-on: macos-15
+    runs-on: macos-26
     strategy:
       fail-fast: false
       matrix:
         CONFIGURATION: ["debug", "release"]
     steps:
-    - uses: actions/checkout@v5
+    - uses: actions/checkout@v6
     - name: Build and Test Library
       run:  |
         set -eu
@@ -47,7 +47,7 @@ jobs:
         PLATFORM: ["ios", "macos", "tvos", "visionos", "watchos"]
         CONFIGURATION: ["Debug", "Release"]
     steps:
-    - uses: actions/checkout@v5
+    - uses: actions/checkout@v6
     - name: Build and Test Library
       run:  |
         set -eu