Update README.md

Co-authored-by: Markus Hentsch <129268441+markus-hentsch@users.noreply.github.com>
Signed-off-by: anjastrunk <119566837+anjastrunk@users.noreply.github.com>

README.md

@@ -38,7 +38,7 @@ gx-credential-generator outputs the following Gaia-X Credentials for a CSP in or
 - Gaia-X Terms and Conditions signed by a CSP as an instance of Gaia-X class `GaiaXTermsAndConditions`
 - Legal Registration number issued by a Notary Service accredited by GXDCH as an instance of Gaia-X class `LegalRegistrationNumber`
 - Gaia-X mandatory attributes for a CSP as an instance of Gaia-X class `LegalPerson`
-- Compliance Credentials for CSP issued by GXDCH Compliance Service as an instance of Gaia-X class `compliance`
+- Compliance Credentials for a CSP issued by the GXDCH Compliance Service as an instance of Gaia-X class `compliance`
 
 CSP's properties are not discoverable and read out from configuration file. See [configuration](#configuration) section for more details.