release.md: Clarify release procedure.

release.md

@@ -5,10 +5,10 @@
   - check with multiple zsh versions
 - Update changelog.md
 - Remove `-dev` suffix from `./.version`;
-  Commit that;
+  Commit that using 'git commit -m "Tag version $(<.version).";
   Tag it using `git tag $(<.version)`;
   Increment `./.version` and restore the `-dev` suffix;
-  Commit that.
+  Commit that using 'git commit -C b5c30ae52638e81a38fe5329081c5613d7bd6ca5'.
 - Push with `git push --tags`
 - Notify downstreams (OS packages)
   - anitya should autodetect the tag