Correct release notes re: annotation (#296)

* Correct release notes re: annotation

* Update RELEASE.md

Co-authored-by: Jarrod Millman <jarrod.millman@gmail.com>

* '[pre-commit.ci 🤖] Apply code format tools to PR'

---------

Co-authored-by: Jarrod Millman <jarrod.millman@gmail.com>
Co-authored-by: pre-commit-ci[bot] <66853113+pre-commit-ci[bot]@users.noreply.github.com>

Author: 3 people

RELEASE.md

@@ -37,10 +37,10 @@ Example `version number`
 
 - Tag the release in git:
 
-      git tag -a -s v${VERSION} -m "signed ${VERSION} tag"
+      git tag -s v${VERSION} -m "signed ${VERSION} tag"
 
-  If you do not have a gpg key, use -u instead; it is important for
-  Debian packaging that the tags are annotated
+  (If you do not have a GPG key, follow the tutorial to set it up:
+  https://help.github.com/articles/signing-commits-with-gpg/)
 
 - Push the new meta-data to github: