Upgrade github actions node version

[keerthanak-tw]

Github actions have started using node 16 and the usage of old version is leading to the following warning:

For more info about the version and fix, refer to this blog by github.

The deprecated usage of save-state and set-output can also be addressed along with this. (reference)

Tasks:

• Upgrade github actions to use node 16
• Find alternative for save-state and set-output commands

[keerthanak-tw]

The save-state and set-output usage has been removed and hence its only about the actions to be upgraded