Update Jenkins Security Scan action (#295)

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

@@ -7,9 +7,14 @@ on:
     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: 17 # What version of Java to set up for the build.
+      # java-version: 21 # Optionally specify what version of Java to set up for the build, or remove to use a recent default.