Formally make app compatible with NC28

Signed-off-by: Christian Wolf <[email protected]>

Author: christianlupus

.github/actions/deploy/appinfo/info.xml.dist

@@ -20,7 +20,7 @@
     <screenshot>https://raw.githubusercontent.com/nextcloud/cookbook/stable/img/screenshot2.png</screenshot>
     <dependencies>
         <php min-version="7.4"/>
-        <nextcloud min-version="25" max-version="27"/>
+        <nextcloud min-version="28" max-version="28"/>
     </dependencies>
     <navigations>
         <navigation>

appinfo/info.xml

@@ -20,7 +20,7 @@
     <screenshot>https://raw.githubusercontent.com/nextcloud/cookbook/stable/img/screenshot2.png</screenshot>
     <dependencies>
         <php min-version="7.4"/>
-        <nextcloud min-version="25" max-version="27"/>
+        <nextcloud min-version="28" max-version="28"/>
     </dependencies>
     <navigations>
         <navigation>