Enable Jenkins security scan (#209)

It is stated in the `JENKINS SECURITY POLICY` that

> The Jenkins project takes security seriously. We make every
> possible effort to ensure users can adequately secure their
> automation infrastructure. To that end, we work with Jenkins core and
> plugin developers, as well as security researchers, to fix security
> vulnerabilities in Jenkins in a timely manner, and to improve the security
> of Jenkins in general.

Apply the Jenkins security scan to this repository.

Thanks to @strangelookingnerd for starting this effort!

Author: MarkEWaite

.github/workflows/jenkins-security-scan.yml

@@ -0,0 +1,21 @@
+name: Jenkins Security Scan
+
+on:
+  push:
+    branches:
+      - master
+  pull_request:
+    types: [ opened, synchronize, reopened ]
+  workflow_dispatch:
+
+permissions:
+  security-events: write
+  contents: read
+  actions: read
+
+jobs:
+  security-scan:
+    uses: jenkins-infra/jenkins-security-scan/.github/workflows/jenkins-security-scan.yaml@v2
+    with:
+      java-cache: 'maven' # Optionally enable use of a build dependency cache. Specify 'maven' or 'gradle' as appropriate.
+      java-version: 21 # What version of Java to set up for the build.