Docs/fix typo and grammar in CONTRIBUTING.md (#35024)

Author: Udehlee

CONTRIBUTING.md

@@ -591,7 +591,7 @@ be reviewed by two maintainers and must pass the automatic tests.
 ## Releasing Gitea
 
 - Let $vmaj, $vmin and $vpat be Major, Minor and Patch version numbers, $vpat should be rc1, rc2, 0, 1, ...... $vmaj.$vmin will be kept the same as milestones on github or gitea in future.
-- Before releasing, confirm all the version's milestone issues or PRs has been resolved. Then discuss the release on Discord channel #maintainers and get agreed with almost all the owners and mergers. Or you can declare the version and if nobody against in about serval hours.
+- Before releasing, confirm all the version's milestone issues or PRs has been resolved. Then discuss the release on Discord channel #maintainers and get agreed with almost all the owners and mergers. Or you can declare the version and if nobody is against it in about several hours.
 - If this is a big version first you have to create PR for changelog on branch `main` with PRs with label `changelog` and after it has been merged do following steps:
   - Create `-dev` tag as `git tag -s -F release.notes v$vmaj.$vmin.0-dev` and push the tag as `git push origin v$vmaj.$vmin.0-dev`.
   - When CI has finished building tag then you have to create a new branch named `release/v$vmaj.$vmin`