Change Vec3 to Vec

Event/PhysEvent/include/Event/Bremsstrahlung.h

@@ -43,7 +43,7 @@ namespace LHCb::Event::Bremsstrahlung {
   namespace details {
     using int_t       = SIMDWrapper::scalar::int_v;
     using float_t     = SIMDWrapper::scalar::float_v;
-    using momentum3_t = LHCb::LinAlg::Vec3<float_t>;
+    using momentum3_t = LHCb::LinAlg::Vec<float_t, 3>;
     using momentum4_t = LHCb::LinAlg::Vec<float_t, 4>;
 
     namespace defaults {