ci: removed java 21 from test (sbt not started)

Author: QuadStingray

.github/workflows/main_test_release.yml

@@ -14,7 +14,7 @@ jobs:
     strategy:
       matrix:
         mongodb-version: ['4.4', '5.0', '6.0', '7.0']
-        java: [ '11', '17', '21' ]
+        java: [ '11', '17' ]
     steps:
       - uses: actions/checkout@main
       - name: Setup TimeZone

.github/workflows/other_test.yml

@@ -14,7 +14,7 @@ jobs:
     strategy:
       matrix:
         mongodb-version: ['4.4', '5.0', '6.0', '7.0']
-        java: [ '11', '17', '21' ]
+        java: [ '11', '17' ]
     steps:
     - uses: actions/checkout@main
     - name: Set up JDK ${{ matrix.Java }}