Add raise from for exception handling

Author: kmatch98

adafruit_display_text/label.py

@@ -355,8 +355,8 @@ def text(self, new_text):
             current_anchored_position = self.anchored_position
             self._update_text(str(new_text))
             self.anchored_position = current_anchored_position
-        except RuntimeError:
-            raise RuntimeError("Text length exceeds max_glyphs")
+        except RuntimeError as e:
+            raise RuntimeError("Text length exceeds max_glyphs") from e
 
     @property
     def font(self):