Replace Platform.sh CLI with Upsun CLI variables

Author: rasben

action.yml

@@ -56,10 +56,10 @@ runs:
 
         sleep 5s
 
-        export PLATFORMSH_CLI_NO_INTERACTION=1;
-        export PLATFORM_PROJECT=${{ inputs.PLATFORMSH_ID }};
-        export PLATFORM_BRANCH=${{ inputs.ENVIRONMENT_NAME }};
-        export PLATFORMSH_CLI_TOKEN=${{ inputs.PLATFORMSH_KEY }};
+        export UPSUN_CLI_NO_INTERACTION=1;
+        export UPSUN_PROJECT=${{ inputs.PLATFORMSH_ID }};
+        export UPSUN_BRANCH=${{ inputs.ENVIRONMENT_NAME }};
+        export UPSUN_CLI_TOKEN=${{ inputs.PLATFORMSH_KEY }};
 
         curl -fsSL https://raw.githubusercontent.com/platformsh/cli/main/installer.sh | VENDOR=upsun bash