Revert "Update Java release build version to 21 (#441)"

This reverts commit fd42ca9.

Author: igdianov

.github/workflows/build.yml

@@ -16,7 +16,7 @@ jobs:
     runs-on: ubuntu-latest
     strategy:
       matrix:
-        java: [ '21' ]
+        java: [ '17', '19', '21' ]
     steps:
     - uses: actions/checkout@v4
 

pom.xml

@@ -15,7 +15,7 @@
   </description>
 
   <properties>
-    <java.version>21</java.version>
+    <java.version>17</java.version>
     <maven.compiler.source>${java.version}</maven.compiler.source>
     <maven.compiler.target>${java.version}</maven.compiler.target>
 
@@ -28,7 +28,6 @@
     <project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
     <skipPrettier>false</skipPrettier>
     <skipStaging>false</skipStaging>
-    <generateBackupPoms>false</generateBackupPoms>
   </properties>
 
   <distributionManagement>