Fail to load /home/runner/work/_actions/lukka/run-cmake/v1/action.yml`

Describe the bug
since runner version '2.168.0' my run-cmake is broken. It is working on Current runner version: '2.165.2'.

Download action repository 'lukka/run-cmake@v1'
##[error](Line: 34, Col: 14):
##[error](Line: 34, Col: 14): Unrecognized named-value: 'env'. Located at position 1 within expression: env.RUNVCPKG_VCPKG_TRIPLET
##[error]Fail to load /home/runner/work/_actions/lukka/run-cmake/v1/action.yml`

My action.yml contains:

vcpkgTriplet:
    default: "${{ env.RUNVCPKG_VCPKG_TRIPLET }}"

To Reproduce
Use lukka/run-cmake@v1 action in your workflow on GitHub.

Expected behavior
vcpkgTriplet should be set to the value of the env var

Runner Version and Platform

Version of your runner?
'2.168.0'

OS of the machine running the runner? OSX/Windows/Linux/...
ubuntu/Linux

What's not working?

The runner fails at parsing action.yml

Job Log Output

https://github.com/lukka/run-cmake/issues/11

Start with the referenced action.yml at line 34 and reproduce the failure using runner version 2.168.0 with lukka/run-cmake@v1 on Linux. Trace the runner's parsing of the env.RUNVCPKG_VCPKG_TRIPLET expression in the action input default. Done means the action.yml loads successfully and vcpkgTriplet receives the environment variable value.