Improve SL metrics examples about docs.getdbt.com

[SOVALINUX]

Re "multi-line YML format is supported by filter field and single-line won't work":
Looks like I was not right with this statement

1. filter: {{ Dimension('some_model__some_dimension') }} = true - one-line no quotes doesn't work, but probably it's according to YML spec.
2. filter: "{{ Dimension('some_model__some_dimension') }} = true" - one-line double quoted works well (and I had a feeling that this also didn't work for me initially)
3. multi-line filter as in doc examples works as expected

So, thanks for checking - please disregard this part

[mirnawong1]

tested and confirmed

[mirnawong1]

hey @SOVALINUX thanks for opening this up! you're absolutely right and I'm working on a pr to get this updated. can you provide more info on what you mean with "multi-line YML format is supported by filter field and single-line won't work"?

[mirnawong1]

that's great, thanks for confirming and coming back to update the issue @SOVALINUX ! we've merged a PR #5409 which addressed your feedback - i really appreciate it!