Use Eclipse Temurin, not AdoptOpenJDK in action (#40)

* Use Eclipse Temurin, not AdoptOpenJDK in action

The 'adopt' distribution has moved to Eclipse Temurin.

It won't be updated at the AdoptOpenJDK location.

See jenkinsci/jenkins#6406

https://github.com/actions/setup-java/blob/main/docs/advanced-usage.md#adopt

https://github.com/actions/setup-java#usage

* Update .github/workflows/cd.yaml

Co-authored-by: Tim Jacomb <21194782+timja@users.noreply.github.com>

.github/workflows/cd.yaml

@@ -47,9 +47,9 @@ jobs:
         with:
           fetch-depth: 0
       - name: Set up JDK 8
-        uses: actions/setup-java@v2
+        uses: actions/setup-java@v3
         with:
-          distribution: 'adopt'
+          distribution: 'temurin'
           java-version: 8
       - name: Release
         uses: jenkins-infra/jenkins-maven-cd-action@v1.2.0