Bump KorAP-Tokenizer to v2.3.0 and our version to 2.6.2

Change-Id: I7345e72cd67326797ca574bbf5f63bc3fb34de44
diff --git a/.github/workflows/linux.yml b/.github/workflows/linux.yml
index 7334fa7..0ffd43a 100644
--- a/.github/workflows/linux.yml
+++ b/.github/workflows/linux.yml
@@ -20,6 +20,11 @@
         with:
           perl-version: ${{ matrix.perl }}
       - run: perl -V
+      - name: Set up JDK 21
+        uses: actions/setup-java@v3
+        with:
+          java-version: '21'
+          distribution: 'temurin'
       - name: Install dependencies
         run: |
           cpanm File::ShareDir::Install