pw_analog: Use inclusive language

Bug: 386
Change-Id: Ia3bdd3ae277651298d656d7071b79d4acf7e3f15
Reviewed-on: https://pigweed-review.googlesource.com/c/pigweed/pigweed/+/47321
Pigweed-Auto-Submit: Rob Mohr <mohrr@google.com>
Commit-Queue: Auto-Submit <auto-submit@pigweed.google.com.iam.gserviceaccount.com>
Reviewed-by: Armando Montanez <amontanez@google.com>

pw_analog/microvolt_input_test.cc

diff --git a/pw_analog/microvolt_input_test.cc b/pw_analog/microvolt_input_test.cc
index e4b412f..bb14a6a 100644
--- a/pw_analog/microvolt_input_test.cc
+++ b/pw_analog/microvolt_input_test.cc
@@ -46,7 +46,7 @@
 constexpr int32_t kInvertedReferenceMinVoltageUv =
     std::numeric_limits<int32_t>::max();
 
-// Dummy test voltage input that's used for testing.
+// Fake voltage input that's used for testing.
 class TestMicrovoltInput : public MicrovoltInput {
  public:
   constexpr explicit TestMicrovoltInput(AnalogInput::Limits limits,