[FLINK-37196][docs] Use JDK17 to run documentation build

Author: reswqa

.github/workflows/docs.sh

@@ -20,8 +20,8 @@ set -e
 
 # override env to use Java 11 to for build instead default Java 8
 # path to JDK is taken from https://github.com/apache/flink-connector-shared-utils/blob/ci_utils/docker/base/Dockerfile#L37-L40
-export JAVA_HOME=$JAVA_HOME_11_X64
-export PATH=$JAVA_HOME_11_X64/bin:$PATH
+export JAVA_HOME=$JAVA_HOME_17_X64
+export PATH=$JAVA_HOME_17_X64/bin:$PATH
 
 mvn --version
 java -version