Clean up

Following commit just covers few spellings and grammatical corrections
in src code files and README.

Verified:
No impact on oob-bios functionality.

Change-Id: Iaaa1a89186928fbb750c5f38fc163a12597ced08
Signed-off-by: Smriti-Ayushi <smriti.ayushi@linux.intel.com>
diff --git a/src/main.cpp b/src/main.cpp
index b0c8d84..6e2a963 100644
--- a/src/main.cpp
+++ b/src/main.cpp
@@ -32,7 +32,7 @@
     sdbusplus::asio::object_server objectServer(systemBus);
 
     /**
-     * Manager class is responsible handling methods and signals under
+     * Manager class is responsible for handling methods and signals under
      * the following object path and interface.
      *
      * Object path : /xyz/openbmc_project/bios_config/manager
@@ -41,7 +41,7 @@
     bios_config::Manager manager(objectServer, systemBus);
 
     /**
-     * Password class is responsible handling methods and signals under
+     * Password class is responsible for handling methods and signals under
      * the following object path and interface.
      *
      * Object path : /xyz/openbmc_project/bios_config/password