installation problem ubuntu 22.04

in order to get `]add GMT` to work I had to do the following

```
sudo ln -s /lib/x86_64-linux-gnu/libgmt.so.6.3.0 /lib/x86_64-linux-gnu/libgmt.so
```

I dont know if this was a problem on my end or an expectation from GMT.

```
$ ls -lsa /lib/x86_64-linux-gnu/libgmt*
0 lrwxrwxrwx 1 root root 37 Jun 16 17:39 /lib/x86_64-linux-gnu/libgmt.so -> /lib/x86_64-linux-gnu/libgmt.so.6.3.0
0 lrwxrwxrwx 1 root root 15 Dec 9 2021 /lib/x86_64-linux-gnu/libgmt.so.6 -> libgmt.so.6.3.0
4792 -rw-r--r-- 1 root root 4903336 Dec 9 2021 /lib/x86_64-linux-gnu/libgmt.so.6.3.0
```