Jarek Radosz 9892844507
DEV: Fix a flaky validation message (#16141)
The order of tags in the validation error message could be random, which we don't really care about, but it made the specs flake out once in a while.

The flaky specs were:

```
spec/lib/discourse_tagging_spec.rb:511
spec/lib/discourse_tagging_spec.rb:519
```
2022-03-09 09:38:05 +08:00
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