Update readme to use Java 17

Update CI test with refs to Krill and Koral tags using the old groupId.

Update change log to prepare for release

Change-Id: I260511b9087c41cae08cd280a17060fbff30b7f0
diff --git a/.github/workflows/ci_test.yml b/.github/workflows/ci_test.yml
index 2d31a4a..61579e2 100644
--- a/.github/workflows/ci_test.yml
+++ b/.github/workflows/ci_test.yml
@@ -22,12 +22,14 @@
         with:
           repository: KorAP/Krill
           path: Krill
+          ref: v0.61.3
 
       - name: Checkout Koral
         uses: actions/checkout@v2
         with:
           repository: KorAP/Koral
           path: Koral
+          ref: v0.41
 
       - name: Set up JDK 17
         uses: actions/setup-java@v1