Update default macOS label to Tahoe (#230)

* Update default macOS to Tahoe

Swiftlang’s self-hosted runners are now running on Tahoe.

* Update the swift_package_test.yml workflows to use Tahoe

Author: shahmishal

.github/workflows/soundness.yml

@@ -38,7 +38,7 @@ on:
       docs_check_macos_version:
         type: string
         description: "macOS version for the macOS docs check job."
-        default: "sequoia"
+        default: "tahoe"
       docs_check_macos_arch:
         type: string
         description: "macOS arch for the macOS docs check job."

.github/workflows/swift_package_test.yml

@@ -17,7 +17,7 @@ on:
       macos_versions:
         type: string
         description: "macOS version list (JSON)"
-        default: "[\"sequoia\"]"
+        default: "[\"tahoe\"]"
       macos_archs:
         type: string
         description: "macOS arch list (JSON)"