Fixed Examples by Updating to Gradle 7.5.1 and Java 11

[handstandsam]

Updated to Gradle 7.5.1 and Java 11.

I was trying this repo out for the first time and was having issues running the installDist task with Java 8 on my ARM based M1 Mac. These updates fixed it.

I'm using the following JDK with java --version:

openjdk 11.0.15 2022-04-19 LTS
OpenJDK Runtime Environment Zulu11.56+19-CA (build 11.0.15+10-LTS)
OpenJDK 64-Bit Server VM Zulu11.56+19-CA (build 11.0.15+10-LTS, mixed mode)

Original Issue before these changes:

* What went wrong:
Could not determine the dependencies of task ':server:distTar'.
> Could not resolve all dependencies for configuration ':server:runtimeClasspath'.
   > Failed to calculate the value of task ':server:compileJava' property 'javaCompiler'.
      > Unable to download toolchain matching these requirements: {languageVersion=8, vendor=any, implementation=vendor-specific}
         > Unable to download toolchain. This might indicate that the combination (version, architecture, release/early access, ...) for the requested JDK is not available.
            > Could not read 'https://api.adoptopenjdk.net/v3/binary/latest/8/ga/mac/aarch64/jdk/hotspot/normal/adoptopenjdk' as it does not exist.

[linux-foundation-easycla]

The committers listed above are authorized under a signed CLA.

• ✅ login: handstandsam / name: Sam Edwards (ea89449)

[handstandsam]

@jamesward thanks for volunteering to review 😂 - I just signed the CLA.

[jamesward]

Thank you for maintaining our samples!