Nodejs error do not set a non-zero exit-code

[staabm]

Built which error with

(node:1) UnhandledPromiseRejectionWarning: YAMLException: bad indentation of a mapping entry at line 9, column 2:
[542](https://github.com/staabm/staabm.github.io/runs/7235660879?check_suite_focus=true#step:4:543)
     ogImage:
[543](https://github.com/staabm/staabm.github.io/runs/7235660879?check_suite_focus=true#step:4:544)
     ^
[544](https://github.com/staabm/staabm.github.io/runs/7235660879?check_suite_focus=true#step:4:545)
    at generateError (/usr/local/src/generate-og-image/dist/index.js:28145:10)
[545](https://github.com/staabm/staabm.github.io/runs/7235660879?check_suite_focus=true#step:4:546)
    at throwError (/usr/local/src/generate-og-image/dist/index.js:28151:9)
[546](https://github.com/staabm/staabm.github.io/runs/7235660879?check_suite_focus=true#step:4:547)
    at readBlockMapping (/usr/local/src/generate-og-image/dist/index.js:29085:7)
[547](https://github.com/staabm/staabm.github.io/runs/7235660879?check_suite_focus=true#step:4:548)
    at composeNode (/usr/local/src/generate-og-image/dist/index.js:29337:12)
[548](https://github.com/staabm/staabm.github.io/runs/7235660879?check_suite_focus=true#step:4:549)
    at readDocument (/usr/local/src/generate-og-image/dist/index.js:29497:3)
[549](https://github.com/staabm/staabm.github.io/runs/7235660879?check_suite_focus=true#step:4:550)
    at loadDocuments (/usr/local/src/generate-og-image/dist/index.js:29553:5)
[550](https://github.com/staabm/staabm.github.io/runs/7235660879?check_suite_focus=true#step:4:551)
    at Object.load (/usr/local/src/generate-og-image/dist/index.js:29574:19)
[551](https://github.com/staabm/staabm.github.io/runs/7235660879?check_suite_focus=true#step:4:552)
    at parse (/usr/local/src/generate-og-image/dist/index.js:6512:27)
[552](https://github.com/staabm/staabm.github.io/runs/7235660879?check_suite_focus=true#step:4:553)
    at Object.extractor [as default] (/usr/local/src/generate-og-image/dist/index.js:6495:12)
[553](https://github.com/staabm/staabm.github.io/runs/7235660879?check_suite_focus=true#step:4:554)
    at /usr/local/src/generate-og-image/dist/index.js:61147:54
[554](https://github.com/staabm/staabm.github.io/runs/7235660879?check_suite_focus=true#step:4:555)
(node:1) UnhandledPromiseRejectionWarning: Unhandled promise rejection. This error originated either by throwing inside of an async function without a catch block, or by rejecting a promise which was not handled with .catch(). (rejection id: 1)
[555](https://github.com/staabm/staabm.github.io/runs/7235660879?check_suite_focus=true#step:4:556)
(node:1) [DEP0018] DeprecationWarning: Unhandled promise rejections are deprecated. In the future, promise rejections that are not handled will terminate the Node.js process with a non-zero exit code.

Do not set a proper exit-code and therefore the action is considered successful, even though it failed

https://github.com/staabm/staabm.github.io/runs/7235660879?check_suite_focus=true