fix: update link in copyright

perun-oidc-server-webapp/src/main/webapp/WEB-INF/tags/copyright.tag

@@ -7,5 +7,5 @@
     PerunOidcConfig perunOidcConfig = WebApplicationContextUtils.getWebApplicationContext(application).getBean("perunOidcConfig", PerunOidcConfig.class);
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-<a href="https://gitlab.ics.muni.cz/perun-proxy-aai/java/OpenID-Connect-Java-Spring-Server">Perun MITREid</a> <span class="label"><%=perunOidcConfig.getPerunOIDCVersion()%></span>
+<a href="https://gitlab.ics.muni.cz/perun/perun-proxyidp/v1/OpenID-Connect-Java-Spring-Server">Perun MITREid</a> <span class="label"><%=perunOidcConfig.getPerunOIDCVersion()%></span>
 <span class="pull-right">&copy; 2017 The MIT Internet Trust Consortium.</span>.