Fix `git push --delete origin tagname` helper message

[codecov-commenter]

Codecov Report

Patch coverage: 100.00% and project coverage change: -0.04 :warning:

Comparison is base (737f867) 86.78% compared to head (4b0e153) 86.74%.

Additional details and impacted files

```diff @@ Coverage Diff @@ ## main #352 +/- ## ========================================== - Coverage 86.78% 86.74% -0.04% ========================================== Files 18 18 Lines 2157 2143 -14 ========================================== - Hits 1872 1859 -13 + Misses 285 284 -1 ``` | [Impacted Files](https://codecov.io/gh/iterative/gto/pull/352?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=iterative) | Coverage Δ | | |---|---|---| | [gto/constants.py](https://codecov.io/gh/iterative/gto/pull/352?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=iterative#diff-Z3RvL2NvbnN0YW50cy5weQ==) | `100.00% <ø> (ø)` | | | [gto/registry.py](https://codecov.io/gh/iterative/gto/pull/352?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=iterative#diff-Z3RvL3JlZ2lzdHJ5LnB5) | `90.57% <100.00%> (+0.40%)` | :arrow_up: | ... and [1 file with indirect coverage changes](https://codecov.io/gh/iterative/gto/pull/352/indirect-changes?src=pr&el=tree-more&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=iterative) Help us with your feedback. Take ten seconds to tell us [how you rate us](https://about.codecov.io/nps?utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=iterative). Have a feature suggestion? [Share it here.](https://app.codecov.io/gh/feedback/?utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=iterative)

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