Change io_service to io_context

This was renamed a while back in boost to be compliant with the
std::executors proposal.

Change-Id: Ib56544a0a7478990d18fe9e0bbbd8db1e52fa5b8
Signed-off-by: Ed Tanous <edtanous@google.com>
diff --git a/src/IntelCPUSensor.hpp b/src/IntelCPUSensor.hpp
index 399e765..b23c0dc 100644
--- a/src/IntelCPUSensor.hpp
+++ b/src/IntelCPUSensor.hpp
@@ -25,7 +25,7 @@
     IntelCPUSensor(const std::string& path, const std::string& objectType,
                    sdbusplus::asio::object_server& objectServer,
                    std::shared_ptr<sdbusplus::asio::connection>& conn,
-                   boost::asio::io_service& io, const std::string& sensorName,
+                   boost::asio::io_context& io, const std::string& sensorName,
                    std::vector<thresholds::Threshold>&& thresholds,
                    const std::string& configuration, int cpuId, bool show,
                    double dtsOffset);