Doc: Fix required java versions for spark 3.5

[dvorst]

The original description "PySpark requires Java 8 or later" is incorrect since 3.5 does not support java 8 anymore and the latest supported version is 17, the downloading page however, does correctly state this. I thus corrected the mentioned java versions.

Edit: the downloading page i am referring to: https://spark.apache.org/docs/3.5.3/#downloading

[LuciferYang]

Do you mean that Apache Spark 3.5 no longer supports Java 8 in PySpark? Are there any specific cases? If that's really the case, we should fix it to support Java 8 instead of revising the documentation.

[dvorst]

The following is mentioned on the downloadings page (https://spark.apache.org/docs/3.5.3/#downloading)

Java 8 prior to version 8u371 support is deprecated as of Spark 3.5.0

For some reason, I misread this and was under the impression that support for Java 8 was deprecated in its entirety as of 3.5.0.

I added a new commit where I updated the documentation and included Java 8 back in, with an exception for versions prior to 8u371.

[LuciferYang]

Current changes are fine to me, but please do not disrupt the template for the [r description, every item must be filled out, and the title of the pr should also adhere to the standard format(can refer to https://spark.apache.org/contributing.html). And are there any other cases where the description of Java 8 versions is not accurate?