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: Iccc8a6107616afb3a6b772420651e717a688ce86
Signed-off-by: Manojkiran Eda <manojkiran.eda@gmail.com>
diff --git a/src/example/example.yaml b/src/example/example.yaml
index ac53c0e..9d2420e 100644
--- a/src/example/example.yaml
+++ b/src/example/example.yaml
@@ -269,7 +269,7 @@
 
 - name: pathwatch errorlog
   description: >
-      'A pathwatch watches on the specified object path goup. pathcallback are
+      'A pathwatch watches on the specified object path group. pathcallback are
       actions PDM should take when instructed to do so.'
 
   class: pathwatch