[clang-tidy] Concatenate nested namespaces (6/7: components t-z) (#16305)

esphome/components/tm1638/binary_sensor/tm1638_key.cpp

@@ -1,7 +1,6 @@
 #include "tm1638_key.h"
 
-namespace esphome {
-namespace tm1638 {
+namespace esphome::tm1638 {
 
 void TM1638Key::keys_update(uint8_t keys) {
   bool pressed = keys & (1 << key_code_);
@@ -9,5 +8,4 @@ void TM1638Key::keys_update(uint8_t keys) {
     this->publish_state(pressed);
 }
 
-}  // namespace tm1638
-}  // namespace esphome
+}  // namespace esphome::tm1638