Fix arm64-release-static vcpkg triplet (microsoft#5431)

In microsoft#5423 I used a wrong variable for the arm64-release-static vcpkg
triplet. Didn't notice it until running on internal builds because we
don't build that configuration in CI builds here...
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Author: florelis

src/VcpkgCustomTriplets/arm64-release-static.cmake

@@ -1,4 +1,4 @@
-include("${CMAKE_CURRENT_SOURCE_DIR}/common.cmake")
+include("${CMAKE_CURRENT_LIST_DIR}/common.cmake")
 set(VCPKG_TARGET_ARCHITECTURE arm64)
 set(VCPKG_CRT_LINKAGE static)
 set(VCPKG_BUILD_TYPE release)