Fix parsing of µs time periods in config (#7495)

esphome/config_validation.py

@@ -750,6 +750,7 @@ def time_period_str_unit(value):
         "ns": "nanoseconds",
         "nanoseconds": "nanoseconds",
         "us": "microseconds",
+        "µs": "microseconds",
         "microseconds": "microseconds",
         "ms": "milliseconds",
         "milliseconds": "milliseconds",

tests/components/esp32_rmt_led_strip/test.esp32-c3-idf.yaml

@@ -12,7 +12,7 @@ light:
     num_leds: 60
     rmt_channel: 1
     rgb_order: RGB
-    bit0_high: 100us
-    bit0_low: 100us
-    bit1_high: 100us
-    bit1_low: 100us
+    bit0_high: 100µs
+    bit0_low: 100µs
+    bit1_high: 100µs
+    bit1_low: 100µs

tests/components/esp32_rmt_led_strip/test.esp32-idf.yaml

@@ -12,7 +12,7 @@ light:
     num_leds: 60
     rmt_channel: 2
     rgb_order: RGB
-    bit0_high: 100us
-    bit0_low: 100us
-    bit1_high: 100us
-    bit1_low: 100us
+    bit0_high: 100µs
+    bit0_low: 100µs
+    bit1_high: 100µs
+    bit1_low: 100µs