Fix typos in README

README.md

@@ -13,7 +13,7 @@
 
 ## What is VECTO?
 
-VECTO is the offical vehicle simulator developed by the European Commission
+VECTO is the official vehicle simulator developed by the European Commission
 to certify & monitoring energy demands, fuel consumption & CO<sub>2</sub> emissions
 from Heavy Duty Vehicles (HDVs).
 
@@ -95,7 +95,7 @@ the [ECoGeT 3D shapes](https://code.europa.eu/vecto/vecto-cfd) project.
 
 In the [`vecto` group](https://code.europa.eu/vecto) you may find additionally:
 
-- **Vecto Airdrag:** certify $C_d·A$ values from constant speed tests
-- **Vecto Engine:** certify engine declaration XML files as VECTO input
+- **Vecto Airdrag:** certifies $C_d·A$ values from constant speed tests
+- **Vecto Engine:** certifies engine declaration XML files as VECTO input
 - **Vecto EEA hashing-tool:** (archived) monitoring-aid for European Environment Agency 
-- **Vecto Git:** (unused) cirtify any pre-processing file
\ No newline at end of file
+- **Vecto Git:** (unused) certifies any pre-processing file
\ No newline at end of file