Merge pull request #42 from Sensirion/fix_typo

fix typo in sps30.ino

Author: psachs

examples/sps30/sps30.ino

@@ -98,7 +98,7 @@ void loop() {
     Serial.print("NC 10.0: ");
     Serial.println(m.nc_10p0);
 
-    Serial.print("Typical partical size: ");
+    Serial.print("Typical particle size: ");
     Serial.println(m.typical_particle_size);
 #endif