chore(pre-commit): use `info` report level for `rstcheck` [skip ci]

* Automated using https://github.com/myii/ssf-formula/pull/325

.pre-commit-config.yaml

       - id: rstcheck
         name: Check reST files using rstcheck
         exclude: 'docs/CHANGELOG.rst'
-        args: [--report=warning]

.rstcheck.cfg

 [rstcheck]
-report=error
+report=info
 ignore_language=rst
+ignore_messages=(Duplicate (ex|im)plicit target.*|Hyperlink target ".*" is not referenced\.$)