[Infra] Build with Xcode 26.1

Author: paulb777

.github/workflows/common.yml

@@ -96,7 +96,7 @@ jobs:
             xcode: Xcode_16.2
             platform: iOS
           - os: macos-26
-            xcode: Xcode_26.0
+            xcode: Xcode_26.1
             platform: iOS
     runs-on: ${{ matrix.os }}
     steps:

.github/workflows/firebaseai.yml

@@ -46,7 +46,7 @@ jobs:
             xcode: Xcode_16.4
           - os: macos-26
             target: iOS
-            xcode: Xcode_26.0
+            xcode: Xcode_26.1
     runs-on: ${{ matrix.os }}
     needs: spm
     env:
@@ -88,7 +88,7 @@ jobs:
           - os: macos-15
             xcode: Xcode_16.4
           - os: macos-26
-            xcode: Xcode_26.0
+            xcode: Xcode_26.1
     runs-on: ${{ matrix.os }}
     env:
       BRANCH_NAME: ${{ github.head_ref || github.ref_name || 'main' }}