Applied feedback from review pt. 2

Signed-off-by: MrJack <36191829+biagiopietro@users.noreply.github.com>

internal/plugin/installer/installer.go

@@ -157,8 +157,13 @@ func NewForSource(source, version string) (installer Installer, err error) {
 }
 
 // FindSource determines the correct Installer for the given source.
-func FindSource(location string, version string) (Installer, error) {
-	installer, err := existingVCSRepo(location, version)
+// Version is optional; if not provided, it defaults to empty string.
+func FindSource(location string, version ...string) (Installer, error) {
+	v := ""
+	if len(version) > 0 {
+		v = version[0]
+	}
+	installer, err := existingVCSRepo(location, v)
 	if err != nil && err.Error() == "Cannot detect VCS" {
 		slog.Warn(
 			"cannot get information about plugin source",