Add important usage note for triggering builds to release template (r…

…ust-lang#345)

.github/scripts/release-pr-template.ejs

@@ -19,18 +19,28 @@ This is a release PR for **<%= crate.name %>** version **<%= version.actual %>**
 <% } %>
 
 <% if (crate.name == "cargo-binstall") { %>
-Upon merging, this will automatically build the CLI and create a GitHub release.
-<% } else { %>
-Upon merging, this will create the tag `<%= crate.name %>-<%= version.actual %>`.
-<% } %>
+Upon merging, this will automatically create the tag `v<%= version.actual %>`, build the CLI, and create a GitHub release.
+You will still need to manually publish the cargo crate:
 
+```
+$ git switch main
+$ git pull
+$ git switch --detach v<%= version.actual %>
+$ cargo publish -p <%= crate.name %>
+```
+<% } else { %>
+Upon merging, this will create the tag `<%= crate.name %>-v<%= version.actual %>`.
 You will still need to manually publish the cargo crate:
 
 ```
+$ git switch main
 $ git pull
-$ git switch --detach <%= crate.name %>-<%= version.actual %>
+$ git switch --detach <%= crate.name %>-v<%= version.actual %>
 $ cargo publish -p <%= crate.name %>
 ```
+<% } %>
+
+**To trigger builds initially, close and then immediately re-open this PR once.**
 
 <% if (pr.releaseNotes) { %>
 ---