Merge pull request #1054 from alixander/watch-title

fix watch title

ci/release/changelogs/next.md

@@ -2,6 +2,8 @@
 
 #### Improvements 🧹
 
+- `<title>` attribute of HTML in watch mode is the base file name, instead of the whole path. [#1054](https://github.com/terrastruct/d2/pull/1054)
+
 #### Bugfixes ⛑️
 
 - Code blocks are not affected by uppercasing from special themes like Terminal. [#1053](https://github.com/terrastruct/d2/pull/1053)

d2cli/watch.go

@@ -433,7 +433,7 @@ func (w *watcher) handleRoot(hw http.ResponseWriter, r *http.Request) {
 	<div id="d2-err" style="display: none"></div>
 	<div id="d2-svg-container"></div>
 </body>
-</html>`, w.outputPath, w.devMode)
+</html>`, filepath.Base(w.outputPath), w.devMode)
 }
 
 func (w *watcher) handleWatch(hw http.ResponseWriter, r *http.Request) error {