DOCS-1366: Update I2C attributes for bme280 sensor (#2297)

docs/components/sensor/bme280.md

@@ -32,8 +32,7 @@ Then remove and fill in the attributes as applicable to your sensor, according t
 
 ```json {class="line-numbers linkable-line-numbers"}
 {
-  "board": "<your-board-name>",
-  "i2c_bus": "<your-i2c-bus-name-on-board>",
+  "i2c_bus": "<your-i2c-bus-index-on-board>",
   "i2c_address": "<your-i2c-address>"
 }
 ```
@@ -43,8 +42,7 @@ Then remove and fill in the attributes as applicable to your sensor, according t
 
 ```json {class="line-numbers linkable-line-numbers"}
 {
-  "board": "local",
-  "i2c_bus": "i2c_bus1"
+  "i2c_bus": "1"
 }
 ```
 
@@ -63,8 +61,7 @@ Then remove and fill in the attributes as applicable to your sensor, according t
       "type": "sensor",
       "namespace": "rdk",
       "attributes": {
-        "board": "<your-board-name>",
-        "i2c_bus": "<your-i2c-bus-name-on-board>",
+        "i2c_bus": "<your-i2c-bus-index-on-board>",
         "i2c_address": "<your-i2c-address>"
       },
       "depends_on": []
@@ -81,8 +78,7 @@ The following attributes are available for `bme280` sensors:
 <!-- prettier-ignore -->
 | Attribute | Type | Inclusion | Description |
 | --------- | ---- | --------- | ----------  |
-| `board` | string | **Required** | The `name` of the [board](/components/board/) the sensor is wired to. |
-| `i2c_bus` | string | **Required** | The `name` of the [I2C bus](/components/board/#i2cs) on the board that the sensor is wired to. |
+| `i2c_bus` | string | **Required** | The index of the [I2C bus](/components/board/#i2cs) on the board that the sensor is wired to. |
 | `i2c_address`  | string | Optional | Default: `0x77`. The [I2C device address](https://learn.adafruit.com/i2c-addresses/overview) of the sensor. |
 
 {{< readfile "/static/include/components/test-control/sensor-control.md" >}}