* Update macos.md
added a useful information regarding the path where java is installed, if someone has problems to find it
* Update macos.md
again, just made clear how to get the path to the installation (spark)
installed spark version is 3.3.1, however, exporting the path to the bash file is with version 3.3.0, so the exporting spark version is updated to 3.3.1
Previously
```bash
export SPARK_HOME="${HOME}/spark/spark-3.3.0-bin-hadoop3"
export PATH="${SPARK_HOME}/bin:${PATH}"
```
Updated
```bash
export SPARK_HOME="${HOME}/spark/spark-3.3.1-bin-hadoop3"
export PATH="${SPARK_HOME}/bin:${PATH}"
```
I believe using `brew cask` here is incorrect (at least for me it didn't work)
1. `cask` has been deprecated since version `2.6.0` (see [changelog](https://brew.sh/2020/12/01/homebrew-2.6.0/))
2. `brew install --cask java` does not work either (no cask `java`), but `brew install java` does work