add sdkconfig entry at top in the file not at the end

Author: Jason2866

.github/workflows/parallel_build.yaml

@@ -95,10 +95,8 @@ jobs:
             sdkconfig_path="framework-arduinoespressif32/tools/esp32-arduino-libs/$mcu/sdkconfig"
             if [ -f "$sdkconfig_path" ]; then
               echo "Updating $sdkconfig_path with firmware version: $FIRMWARE_VERSION"
-              # Remove existing CONFIG_ESP_HOSTED_IDF_SLAVE_TARGET line if it exists
-              sed -i '/^CONFIG_ESP_HOSTED_IDF_SLAVE_TARGET/d' "$sdkconfig_path"
-              # Add new CONFIG_ESP_HOSTED_IDF_SLAVE_TARGET line
-              echo "CONFIG_ESP_HOSTED_IDF_SLAVE_TARGET=\"$FIRMWARE_VERSION\"" >> "$sdkconfig_path"
+              # Remove existing CONFIG_ESP_HOSTED_IDF_SLAVE_TARGET line and add new one at the beginning
+              sed -i -e '/^CONFIG_ESP_HOSTED_IDF_SLAVE_TARGET/d' -e "1i CONFIG_ESP_HOSTED_IDF_SLAVE_TARGET=\"$FIRMWARE_VERSION\"" "$sdkconfig_path"
             else
               echo "Warning: sdkconfig file not found at $sdkconfig_path"
             fi