add to how to (#430)

Author: mattiaerre

HOW_TO_PUBLISH.md

@@ -14,7 +14,7 @@ npm run test:all
 
 - Bump the version in the package.json file
 
-- Create a branch with the name of the new version number e.g.: `git checkout -b 1.0.0-beta.4`
+- Create a branch with the name of the new version number, e.g.: `git checkout -b 1.0.0-beta.4`
 
 ```bash
 git add .
@@ -24,10 +24,14 @@ git commit -m 'bump version'
 git push
 ```
 
-- Once the PR is merged then `git checkout master` and `git pull`
+- Once the PR is merged, then `git checkout master` and `git pull`
 
 - Uncomment the first line of the `.npmrc` file and comment the second line
 
 - Then publish the package using the following command: `NPM_TOKEN=${NPM_TOKEN} npm publish`
 
 > N.B.: you need to replace `${NPM_TOKEN}` with a valid npm token
+
+- Once the new version is published, add a new release in GitHub; https://github.com/prettier-solidity/prettier-plugin-solidity/releases/new
+
+- The tag version and the name should be prefixed by a `v` followed by the latest published version number; e.g.: `v1.0.0-beta.4`