Make the ERRORS ENCOUNTERED warning about objects not saved by Link less alarming

**Is your feature request related to a problem? Please describe.**
User requests that you please make the ERRORS ENCOUNTERED warning about objects not saved by Link less alarming.

**Describe the solution you'd like**
**Describe alternatives you've considered**
Maybe say INFORMATION or WARNING instead?

**Additional context**
e.g.
```
⎕fx 'foo' '1 2 3' '4 5 6'
'f' ⎕wc 'form'
'cl' ⎕wc 'clipboard'
train←+++×

]link.create # c:\tmp\linktest1
Linked: # ←→ c:\tmp\linktest1 [directory was created]
ERRORS ENCOUNTERED:
3 export(s) failed:
#.cl
#.f
#.train
```

Search the repository for the literal “ERRORS ENCOUNTERED” and trace the warning’s implementation and any tests covering Link export failures. Confirm the intended replacement wording from the issue context, update the warning text, and run the relevant tests to verify failed exports are still reported without the alarmist label.

Written by the indexing model from the issue text.