Fix spelling mistakes using codespell

This commit corrects various spelling mistakes throughout the
repository. The corrections were made automatically using `codespell`[1]
tool.

[1]: https://github.com/codespell-project/codespell

Change-Id: I1312ecaf815d2967f2ac52df0965303455490e25
Signed-off-by: Manojkiran Eda <manojkiran.eda@gmail.com>
diff --git a/src/main.cpp b/src/main.cpp
index 4066b46..84c15e4 100644
--- a/src/main.cpp
+++ b/src/main.cpp
@@ -134,7 +134,7 @@
                 unitName + addInstanceName(instanceName, "@");
             const sdbusplus::message::object_path& objectPath =
                 std::get<static_cast<int>(ListUnitElements::objectPath)>(unit);
-            // Group the service & socket units togther.. Same services
+            // Group the service & socket units together.. Same services
             // are managed together.
             auto it = unitsToMonitor.find(instantiatedUnitName);
             if (it != unitsToMonitor.end())