Correct grammar

Author: jneira

docs/contributing/releases.md

@@ -138,10 +138,10 @@ more details
 
 We aim to do hackage releases following the github ones described above.
 To help in that job we have added a [github workflow](https://github.com/haskell/haskell-language-server/blob/master/.github/workflows/hackage.yml)
-That script check, generates the tar.gz files, unpack thems and build them in isolation against hackage head
+That script checks, generates the tar.gz files, unpacks and builds them in isolation against hackage head
 if the package version in the branch is different from hackage.
 If the package in the branch has the same version as the released one,
-it will check the relevant files have not changed and will thorw an error
-in other case.
+it will check the relevant files have not changed and will throw an error
+otherwise.
 The script will upload the tarballs as candidates, maintainers will have
-to check them and publish them definitely.
+to check and publish them definitely.