Add links to I2C alternatives for the REV color sensor (#1746)

Author: PeterJohnson

source/docs/yearly-overview/known-issues.rst

@@ -13,7 +13,12 @@ Onboard I2C Causing System Lockups
 
 **Issue:** Use of the onboard I2C port, in any language, can result in system lockups. The frequency of these lockups appears to be dependent on the specific hardware (i.e. different roboRIOs will behave differently) as well as how the bus is being used.
 
-**Workaround:** The only surefire mitigation is to use the MXP I2C port instead. Acessing the device less frequently and/or using a different roboRIO may significantly reduce the likelihood/frequency of lockups, it will be up to each team to assess their tolerance of the risk of lockup. This lockup can not be definitively identified on the field and a field fault will not be called for a match where this behavior is believed to occur. This lockup is a CPU/kernel hang, the roboRIO will completely stop responding and will not be accessible via the DS, webpage or SSH. If you can access your roboRIO via any of these methods, you are experiencing a different issue.
+**Workaround:** The only surefire mitigation is to use the MXP I2C port or another device to read the I2C data. Acessing the device less frequently and/or using a different roboRIO may significantly reduce the likelihood/frequency of lockups, it will be up to each team to assess their tolerance of the risk of lockup. This lockup can not be definitively identified on the field and a field fault will not be called for a match where this behavior is believed to occur. This lockup is a CPU/kernel hang, the roboRIO will completely stop responding and will not be accessible via the DS, webpage or SSH. If you can access your roboRIO via any of these methods, you are experiencing a different issue.
+
+Several alternatives exist for accessing the REV color sensor without using the roboRIO I2C port. A similar approach could be used for other I2C sensors.
+
+- Use a `Raspberry Pi Pico <https://github.com/ThadHouse/picocolorsensor/>`. Supports up to 2 REV color sensors, sends data to the roboRIO via serial. The Pi Pico is low cost (less than $10) and readily available.
+- Use a `Raspberry Pi <https://github.com/PeterJohnson/rpi-colorsensor/>`. Supports 1-4 color sensors, sends data to the roboRIO via NetworkTables. Primarily useful for teams already using a Raspberry Pi as a coprocessor.
 
 CAN bus utilization is noisy
 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^