docs: change .png -> .jpg

Author: aliphys

README.md

@@ -34,15 +34,15 @@ It allows you to connect to the internet, send and receive SMS messages, and get
     | CTS (Pin 4)            | RX_P (Pin 7)        |
     | mPCIE_GPIO_RST (Pin 5) | mPCIE_RST (Pin 9)   |
 
-    <img src="./docs/Arduino_Portenta_Mid_Carrier_PortentaH7_and_PCIEBreakout_Pins.png" alt="Portenta Mid Carrier with Portenta H7 and PCIE Breakout Pin Configuration" width="400"/>
+    <img src="./docs/Arduino_Portenta_Mid_Carrier_PortentaH7_and_PCIEBreakout_Pins.jpg" alt="Portenta Mid Carrier with Portenta H7 and PCIE Breakout Pin Configuration" width="400"/>
 
 3. On J9, using jumpers connect the following pins:
     | Source (J9)      | Buck Converter (J9) |
     |------------------|---------------------|
     | 3V3 PCIE (Pin 1) | 3V3 BUCK (Pin 3)    |
     | OUT VCC (Pin 2)  | 3V3 BUCK EN (Pin 4) |
 
-    <img src="./docs/Arduino_Portenta_Mid_Carrier_SIM_and_Power_Pins.png" alt="Portenta Mid Carrier SIM and Power Pin Configuration" width="400"/>
+    <img src="./docs/Arduino_Portenta_Mid_Carrier_SIM_and_Power_Pins.jpg" alt="Portenta Mid Carrier SIM and Power Pin Configuration" width="400"/>
 
 4. Insert the [Arduino Pro 4G Module](https://docs.arduino.cc/hardware/pro-4g-module) in the Arduino Portenta Mid Carrier.
 
@@ -52,13 +52,13 @@ It allows you to connect to the internet, send and receive SMS messages, and get
 
 7. (PRO 4G GNSS only) Connect the GNSS antenna (square antenna in [Arduino Pro 4G Module Antennas Kit](https://store.arduino.cc/products/4g-module-antenna)) to the middle microUFL connector marked GNSS.
 
-    <img src="./docs/Arduino_Portenta_Mid_Carrier_GNSS_with_GNSS_MAIN_Antennas.png" alt="Portenta Mid Carrier with Pro 4G Module GNSS with both the MAIN and GNSS antennas connected" width="400"/>
+    <img src="./docs/Arduino_Portenta_Mid_Carrier_GNSS_with_GNSS_MAIN_Antennas.jpg" alt="Portenta Mid Carrier with Pro 4G Module GNSS with both the MAIN and GNSS antennas connected" width="400"/>
 
 8. Insert a [Portenta C33](https://docs.arduino.cc/hardware/portenta-c33) or [Portenta H7](https://docs.arduino.cc/hardware/portenta-h7) Board into the marked location. The USB-C port of the Portenta board should be next to the Ethernet port on the Mid Carrier.
 
 9.  Insert a Terminal Block 2-pin > DC female adapter into the screw terminal (J4). Ensure that the negative (-) pin is connected to GND.
 
-    <img src="./docs/Arduino_Portenta_Mid_Carrier_PortentaC33_4GPRO_GNSS_All_Antennas.png" alt="Portenta Mid Carrier with Portenta C33 and Pro 4G Module GNSS with all antennas connected" width="400"/>
+    <img src="./docs/Arduino_Portenta_Mid_Carrier_PortentaC33_4GPRO_GNSS_All_Antennas.jpg" alt="Portenta Mid Carrier with Portenta C33 and Pro 4G Module GNSS with all antennas connected" width="400"/>
 
 10. Use a 5V adapter that can output at least 3A and connect it to the DC female adapter.