Update docs/tutorials/verifying-kubewarden.md

Co-authored-by: John Krug <[email protected]>
Signed-off-by: Víctor Cuadrado Juan <[email protected]>

docs/tutorials/verifying-kubewarden.md

@@ -75,7 +75,7 @@ ensure the secure supply chain of the images. You can find attestation files on
 the release page of the component or attached to the container image in the OCI
 registry.
 
-We use Docker to build the images and their attestations. Therefore, the cosign
+We use Docker to build the images and their attestations. However, the cosign
 command [does not yet support](https://github.com/sigstore/cosign/issues/2688)
 the verification of the attestations generated by Docker from the OCI registry.
 For this reason, you need to download the files from the release page or the