Revise PCB specifications in README

Updated PCB specifications for dimensions, trace width, and silkscreen.

Author: prashantbhandary

README.md

@@ -35,11 +35,11 @@ The Four Relay Module schematic includes:
 
 The PCB is designed as a 2-layer board with the following specifications:
 
-- **Dimensions**: Standard form factor optimized for space efficiency
+- **Dimensions**: 65*75 mm
 - **Copper Weight**: copper for standard current handling
-- **Trace Width**: Appropriately sized for relay current requirements
+- **Trace Width**: 2.5mm , 1 mm , 0.8 mm , 0.5 mm respectively sized for relay current requirements
 - **Ground Plane**: Full ground plane for noise reduction and thermal management
-- **Silkscreen**: Clear component labeling and polarity indicators
+- **Silkscreen**: component labeling and polarity indicators
 - **Component Spacing**: Optimized for manual assembly and adequate cooling
 
 ![Four Relay Module PCB Design](./FourRelayMoudlePCBDesign.png)
@@ -125,4 +125,4 @@ Contributions to improve the design are welcome. Please feel free to fork the re
 2. Create your Feature Branch (`git checkout -b feature/.. `)
 3. Commit your Changes (`git commit -m 'Add some Feature'`)
 4. Push to the Branch (`git push origin feature/.. `)
-5. Open a Pull Request
+5. Open a Pull Request