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: I7ddcf61ed2d596171384fdb5f0fc1e2feb4240bf
Signed-off-by: Manojkiran Eda <manojkiran.eda@gmail.com>
diff --git a/src/main.cpp b/src/main.cpp
index 914d331..fc02acb 100644
--- a/src/main.cpp
+++ b/src/main.cpp
@@ -91,7 +91,7 @@
         buttonCfg.extraJsonInfo = gpioConfig;
         buttonCfg.type = ConfigType::gpio;
 
-        /* The folloing code checks if the gpio config read
+        /* The following code checks if the gpio config read
         from json file is single gpio config or group gpio config,
         based on that further data is processed. */
         lg2::debug("Found button config : {FORM_FACTOR_NAME}",