Fix action input login info (#19)

Author: caitlynstocker

action.yml

@@ -17,7 +17,7 @@ inputs:
   server:
     description: 'The instance URL hosting Octopus Deploy (i.e. "https://octopus.example.com/"). The instance URL is required, but you may also use the OCTOPUS_URL environment variable.'
   api_key:
-    description: 'The API key used to access Octopus Deploy. You may also use the OctopusDeploy Login Action or OCTOPUS_API_KEY environment variable. It is strongly recommended that this value be retrieved from a GitHub secret.'
+    description: 'The API key used to access Octopus Deploy. You may also use the OctopusDeploy Login Action, OCTOPUS_API_KEY environment variable or OCTOPUS_ACCESS_TOKEN environment variable. It is strongly recommended that this value be retrieved from a GitHub secret.'
 
 runs:
   using: 'node24'