chore(deps): update go toolchain directive to v1.27.2 (#39685) (#39687)

Backport #39685 by @GiteaBot

This PR contains the following updates:

| Package | Type | Update | Change |
|---|---|---|---|
| [go](https://go.dev/)
([source](https://redirect.github.com/golang/go)) | toolchain | patch |
`1.27.1` → `1.27.2` |

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modules/assetfs/embed.go

@@ -102,11 +102,11 @@ func NewEmbeddedFS(data []byte) fs.ReadDirFS {
 	efs := &embeddedFS{data: data, files: make(map[string]*embeddedFileInfo)}
 	efs.meta = sync.OnceValue(func() *EmbeddedMeta {
 		var meta EmbeddedMeta
-		p := bytes.LastIndexByte(data, '\n')
-		if p < 0 {
+		_, metaJSON, ok := bytes.CutLast(data, []byte{'\n'})
+		if !ok {
 			return &meta
 		}
-		if err := json.Unmarshal(data[p+1:], &meta); err != nil {
+		if err := json.Unmarshal(metaJSON, &meta); err != nil {
 			panic("embedded file is not valid")
 		}
 		return &meta

modules/web/routing/funcinfo.go

@@ -135,8 +135,8 @@ func shortenFilename(filename, fallback string) string {
 	if filename == "" {
 		return fallback
 	}
-	if lastIndex := strings.LastIndexByte(filename, '/'); lastIndex >= 0 {
-		if secondLastIndex := strings.LastIndexByte(filename[:lastIndex], '/'); secondLastIndex >= 0 {
+	if dir, _, ok := strings.CutLast(filename, "/"); ok {
+		if secondLastIndex := strings.LastIndexByte(dir, '/'); secondLastIndex >= 0 {
 			return filename[secondLastIndex+1:]
 		}
 	}