Use unprotected key for unit tests

Author: manuelbl

.github/workflows/continuous-integration.yaml

@@ -31,13 +31,11 @@ jobs:
           website: jdk.java.net
           release: 22
           version: latest
-      - name: Configure GPG key
+      - name: Configure unit test GPG key
         run: |
-          gpg --version
-          echo "Encoded key length: ${#GPG_SIGNING_KEY}"
-          echo -n "$GPG_SIGNING_KEY" | base64 --decode | gpg --import
+          echo -n "$UNIT_TEST_SIGNING_KEY" | base64 --decode | gpg --import
         env:
-          GPG_SIGNING_KEY: ${{ secrets.GPG_SIGNING_KEY }}
+          UNIT_TEST_SIGNING_KEY: ${{ env.UNIT_TEST_SIGNING_KEY }}
         shell: bash
       - name: Build java-does-usb
         run: ./mvnw $MAVEN_ARGS -DskipTests clean install javadoc:javadoc