Path for aw-server-rust executable doesn't match the docs

[Game4Move78]

When running make build as per the docs it stores in target release not package. The basename of the executable is also aw-server not aw-server-rust.

Related to ActivityWatch/aw-server-rust#500

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[!IMPORTANT] Update installing-from-source.rst to correct the Rust server executable path and name.

• Documentation:
  • Update installing-from-source.rst to correct the path for the Rust server executable from aw-server-rust/target/package/aw-server-rust to aw-server-rust/target/release/aw-server.

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[ErikBjare]

Seems we are not mentioning make package in this doc?

That's what puts it there as aw-server-rust: https://github.com/ActivityWatch/aw-server-rust/blob/master/Makefile#L86

The proper fix is probably to mention make package

[Game4Move78]

Would also be good to mention make package in another section, but I think it shouldn't be presented as necessary. Assuming you don't want to to run all the steps for packaging and distribution, it would be nice if the docs mentioned that you can run aw-server-rust after make build, providing the correct command.