PR is displayed as "pending" when `warnError` is met

### Version report

Jenkins and plugins versions report:
`Jenkins 2.321` / `Checks plugin 1.0.13`

```
Jenkins: 2.321
OS: Linux - 5.4.149-73.259.amzn2.x86_64
---
ace-editor:1.1
ansicolor:1.0.1
apache-httpcomponents-client-4-api:4.5.13-1.0
authentication-tokens:1.4
aws-credentials:1.32
aws-java-sdk:1.12.101-300.vc09c7be9cb57
aws-java-sdk-cloudformation:1.12.101-300.vc09c7be9cb57
aws-java-sdk-codebuild:1.12.101-300.vc09c7be9cb57
aws-java-sdk-ec2:1.12.101-300.vc09c7be9cb57
aws-java-sdk-ecr:1.12.101-300.vc09c7be9cb57
aws-java-sdk-ecs:1.12.101-300.vc09c7be9cb57
aws-java-sdk-elasticbeanstalk:1.12.101-300.vc09c7be9cb57
aws-java-sdk-iam:1.12.101-300.vc09c7be9cb57
aws-java-sdk-logs:1.12.101-300.vc09c7be9cb57
aws-java-sdk-minimal:1.12.101-300.vc09c7be9cb57
aws-java-sdk-ssm:1.12.101-300.vc09c7be9cb57
basic-branch-build-strategies:1.3.2
blueocean:1.25.1
blueocean-autofavorite:1.2.4
blueocean-bitbucket-pipeline:1.25.1
blueocean-commons:1.25.1
blueocean-config:1.25.1
blueocean-core-js:1.25.1
blueocean-dashboard:1.25.1
blueocean-display-url:2.4.1
blueocean-events:1.25.1
blueocean-executor-info:1.25.1
blueocean-git-pipeline:1.25.1
blueocean-github-pipeline:1.25.1
blueocean-i18n:1.25.1
blueocean-jira:1.25.1
blueocean-jwt:1.25.1
blueocean-personalization:1.25.1
blueocean-pipeline-api-impl:1.25.1
blueocean-pipeline-editor:1.25.1
blueocean-pipeline-scm-api:1.25.1
blueocean-rest:1.25.1
blueocean-rest-impl:1.25.1
blueocean-web:1.25.1
bootstrap4-api:4.6.0-3
bootstrap5-api:5.1.3-1
bouncycastle-api:2.25
branch-api:2.7.0
build-monitor-plugin:1.13+build.202110011223
caffeine-api:2.9.2-29.v717aac953ff3
checks-api:1.7.2
cloudbees-bitbucket-branch-source:726.vb0c1ea6c9336
cloudbees-folder:6.16
cobertura:1.17
code-coverage-api:2.0.4
command-launcher:1.6
credentials:2.6.2
credentials-binding:1.27
data-tables-api:1.11.3-4
disable-github-multibranch-status:1.2
display-url-api:2.3.5
docker-commons:1.17
docker-workflow:1.26
durable-task:493.v195aefbb0ff2
echarts-api:5.2.2-1
embeddable-build-status:2.0.3
favorite:2.3.3
font-awesome-api:5.15.4-1
forensics-api:1.6.0
git:4.10.0
git-client:3.10.0
git-server:1.10
github:1.34.1
github-api:1.133
github-autostatus:3.6.2
github-branch-source:2.11.3
github-checks:1.0.13
github-pr-comment-build:61.v49f749d31d98
google-oauth-plugin:1.0.6
handlebars:3.0.8
handy-uri-templates-2-api:2.1.8-1.0
htmlpublisher:1.28
jackson2-api:2.13.0-230.v59243c64b0a5
jacoco:3.3.0
jaxb:2.3.0.1
jdk-tool:1.5
jenkins-design-language:1.25.1
jira:3.6
jjwt-api:0.11.2-9.c8b45b8bb173
jquery-detached:1.2.1
jquery3-api:3.6.0-2
jsch:0.1.55.2
junit:1.53
kubernetes:1.30.9
kubernetes-cli:1.10.3
kubernetes-client-api:5.4.1
kubernetes-credentials:0.9.0
lockable-resources:2.12
mailer:1.34
matrix-auth:2.6.8
matrix-project:1.19
mercurial:2.15
metrics:4.0.2.8
momentjs:1.1.1
oauth-credentials:0.5
oic-auth:1.8
okhttp-api:4.9.2-20211102
pipeline-aggregator-view:1.11
pipeline-build-step:2.15
pipeline-graph-analysis:1.11
pipeline-input-step:2.12
pipeline-milestone-step:1.3.2
pipeline-model-api:1.9.2
pipeline-model-definition:1.9.2
pipeline-model-extensions:1.9.2
pipeline-rest-api:2.19
pipeline-stage-step:2.5
pipeline-stage-tags-metadata:1.9.2
pipeline-stage-view:2.19
pipeline-utility-steps:2.10.0
plain-credentials:1.7
plugin-util-api:2.5.1
popper-api:1.16.1-2
popper2-api:2.10.2-1
powershell:1.7
pubsub-light:1.16
scm-api:2.6.5
scm-filter-branch-pr:0.5.1
script-security:1.78
snakeyaml-api:1.29.1
sse-gateway:1.24
ssh-credentials:1.19
sshd:3.1.0
structs:1.23
thinBackup:1.10
token-macro:267.vcdaea6462991
trilead-api:1.0.13
variant:1.4
workflow-aggregator:2.6
workflow-api:2.47
workflow-basic-steps:2.24
workflow-cps:2633.v6baeedc13805
workflow-cps-global-lib:548.v9085a486966a
workflow-durable-task-step:1097.veac1aacfbda8
workflow-job:2.42
workflow-multibranch:2.26
workflow-scm-step:2.13
workflow-step-api:2.24
workflow-support:3.8
```

- What Operating System are you using (both controller, and any agents involved in the problem)?

```
Linux
```

### Reproduction steps
- Setting "Publish unstable builds as neutral status checks" checked
- Setting "Skip GitHub Branch Source notifications" checked
- Other settings unchecked
- Add a step with `warnError` in jenkinsfile

### Results

Expected result:

Expect Github PR status to be green (with a warning)

Actual result:

Github PR status is orange (pending)

Unchecking "Publish unstable builds as neutral status checks" gives the same result.