Bump MacOS version in GH actions workflows to be 11.2

.github/workflows/build.yml

@@ -3,7 +3,7 @@ on: [pull_request, workflow_dispatch]
 jobs:
   cocoapods:
     name: CocoaPods
-    runs-on: macOS-latest
+    runs-on: macOS-11.2
     steps:
       - name: Check out repository
         uses: actions/checkout@v2
@@ -15,7 +15,7 @@ jobs:
         run: pod lib lint
   carthage:
     name: Carthage
-    runs-on: macOS-latest
+    runs-on: macOS-11.2
     steps:
       - name: Check out repository
         uses: actions/checkout@v2
@@ -37,7 +37,7 @@ jobs:
         run: xcodebuild -project 'SampleApps/CarthageTest/CarthageTest.xcodeproj' -scheme 'CarthageTest' clean build CODE_SIGNING_ALLOWED=NO
   spm:
     name: SPM
-    runs-on: macOS-latest
+    runs-on: macOS-11.2
     steps:
       - name: Check out repository
         uses: actions/checkout@v2

.github/workflows/tests.yml

@@ -3,7 +3,7 @@ on: [pull_request, workflow_dispatch]
 jobs:
   unit_test_job:
     name: Unit
-    runs-on: macOS-latest
+    runs-on: macOS-11.2
     steps:
       - name: Checkout repository
         uses: actions/checkout@v2
@@ -15,7 +15,7 @@ jobs:
         run: set -o pipefail && xcodebuild -workspace 'Braintree.xcworkspace' -sdk 'iphonesimulator' -configuration 'Debug' -scheme 'UnitTests' -destination 'name=iPhone 11,platform=iOS Simulator'  test | ./Pods/xcbeautify/xcbeautify
   ui_test_job:
     name: UI
-    runs-on: macOS-latest
+    runs-on: macOS-11.2
     steps:
       - name: Checkout repository
         uses: actions/checkout@v2
@@ -27,7 +27,7 @@ jobs:
         run: set -o pipefail && xcodebuild -workspace 'Braintree.xcworkspace' -sdk 'iphonesimulator' -configuration 'Release' -scheme 'UITests' -destination 'name=iPhone 11,platform=iOS Simulator'  test | ./Pods/xcbeautify/xcbeautify
   integration_test_job:
     name: Integration
-    runs-on: macOS-latest
+    runs-on: macOS-11.2
     steps:
       - name: Checkout repository
         uses: actions/checkout@v2