Add same corruption fix from the ssd1306 for the ch1120

Author: malcolm-sparkfun

src/qwiic_grch1120.cpp

@@ -967,7 +967,7 @@ void QwGrCH1120::drawBitmap(uint8_t x0, uint8_t y0, uint8_t dst_width, uint8_t d
         bmp_y += neededBits;
 
         pageCheckBoundsRange(m_pageState[iPage], x0,
-                        x0 + dst_width); // mark dirty range in page desc
+                        x0 + dst_width - 1); // mark dirty range in page desc
     }
 }