Update developer-guide.md (#646)

Co-authored-by: Will Browne <[email protected]>

Author: academo

contribute/developer-guide.md

@@ -62,6 +62,8 @@ We use Go modules for managing Go dependencies. After you've updated/modified mo
 
 If you want to create a new version of the SDK for release, follow these steps:
 
+- Make sure that you have `gorelease` installed
+   - If not, run `go install golang.org/x/exp/cmd/gorelease@latest`
 - Checkout the commit you want to tag (`git checkout <COMMIT_SHA>`)
 - Run [`gorelease`](https://pkg.go.dev/golang.org/x/exp/cmd/gorelease) to compare with the previous release. For example, when preparing to release v0.123.0:
 
@@ -74,11 +76,12 @@ Compatible changes:
 
 v0.123.0 is a valid semantic version for this release.
 ```
+
 - Run `git tag <VERSION>` (For example **v0.123.0**)
   - NOTE: We're using Lightweight Tags, so no other options are required
 - Run `git push origin <VERSION>`
 - Verify that the tag was create successfully [here](https://github.com/grafana/grafana-plugin-sdk-go/tags)
-- Edit the tag on GitHub and create a release from it.
+- Create a release from the tag on GitHub.
   - Use the tag name as title.
   - Click on the _Auto-generate release notes_ button.
   - Add a compatibility section and add the output of the command above.