HTTP-155 remove java 21 from CI matrix

Signed-off-by: davidradl <[email protected]>

Author: davidradl

.github/workflows/push_pr.yml

@@ -29,7 +29,7 @@ jobs:
     strategy:
       matrix:
         flink: [ 1.20.1 ]
-        jdk: [ '11, 17, 21' ]
+        jdk: [ '11, 17' ]
     uses: apache/flink-connector-shared-utils/.github/workflows/ci.yml@ci_utils
     with:
       flink_version: ${{ matrix.flink }}

.github/workflows/weekly.yml

@@ -37,5 +37,5 @@ jobs:
     with:
       flink_version: ${{ matrix.flink_branches.flink }}
       connector_branch: ${{ matrix.flink_branches.branch }}
-      jdk_version: ${{ matrix.flink_branches.jdk || '11, 17, 21' }}
+      jdk_version: ${{ matrix.flink_branches.jdk || '11, 17' }}
       run_dependency_convergence: false