Fix some typos found by codespell (#3598)

esphome/components/remote_base/rc_switch_protocol.cpp

@@ -102,7 +102,7 @@ bool RCSwitchBase::expect_sync(RemoteReceiveData &src) const {
     if (!src.peek_space(this->sync_low_, 1))
       return false;
   } else {
-    // We cant peek a space at the beginning because signals starts with a low to high transition.
+    // We can't peek a space at the beginning because signals starts with a low to high transition.
     // this long space at the beginning is the separation between the transmissions itself, so it is actually
     // added at the end kind of artificially (by the value given to "idle:" option by the user in the yaml)
     if (!src.peek_mark(this->sync_low_))