Fix typo in README.md (duplicated without)


Signed-off-by: Rogerio Prado de Jesus <rogeriopradoj@gmail.com>
Merge pull request #44 from rogeriopradoj/patch-1

Fix typo in README.md (duplicated without)
Variable access via 'env_variables' is deprecated. Use '@env_variables' instead.
Merge pull request #46 from dodwmd/patch-1

Variable access via 'env_variables' is deprecated. Use '@env_variables' ...