sort symbols per OGC requirements: https://github.com/metanorma/metan…

[opoudjis]

…orma-ogc/issues/272

Metanorma PR checklist

• [ ] Breaking changes (list related PRs)
• [ ] Documentation update required (create task for this)
• [ ] External dependency introduced (documentation update need)
• [ ] Gem with native library introduced

[codecov[bot]]

Codecov Report

All modified and coverable lines are covered by tests :white_check_mark:

Comparison is base (c254c8c) 93.56% compared to head (fb74ed4) 93.62%.

Additional details and impacted files

```diff @@ Coverage Diff @@ ## main #606 +/- ## ========================================== + Coverage 93.56% 93.62% +0.06% ========================================== Files 22 22 Lines 994 1004 +10 ========================================== + Hits 930 940 +10 Misses 64 64 ```

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