fix: update .env.example to enclose LOG_ROTATION and LOG_RETENTION values in quotes to avoid errors during setup

[brunoamorim-techlibs]

Problem:
The following erros where happening during setup:

Build E2B code execution template? [y/N]: y

━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━
Building E2B v2 Template (Optional)
━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━
ℹ Found E2B v2 template directory: docker/e2b
ℹ Loading environment variables from .env
/Users/brunoamorim/Developer/techlibs/ROMA/.env: line 226: MB: command not found

Build E2B code execution template? [y/N]: y

━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━
Building E2B v2 Template (Optional)
━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━
ℹ Found E2B v2 template directory: docker/e2b
ℹ Loading environment variables from .env
/Users/brunoamorim/Developer/techlibs/ROMA/.env: line 229: days: command not found
error: Recipe `setup` failed on line 73 with exit code 127

Solution:
To address these issues, just update LOG_RETENTION and LOG_ROTATION values to be between quotes to be correctly interpreted.