Update to latest release of nextcloud 35

Finally getting to the latest release of nextcloud.
MAINTENANCE.md requests that two maintainers install this
repo successfully on one of their main-servers.

compose.fulltextsearch.yml

@@ -29,7 +29,7 @@ services:
         mode: 0600
 
   searchindexer:
-    image: nextcloud:34.0.5-fpm
+    image: nextcloud:35.0.2-fpm
     volumes:
       - nextcloud:/var/www/html/
       - nextapps:/var/www/html/custom_apps:cached

compose.yml

@@ -48,7 +48,7 @@ services:
       start_period: 5m
 
   app:
-    image: nextcloud:34.0.5-fpm
+    image: nextcloud:35.0.2-fpm
     depends_on:
       - db
     configs:
@@ -109,7 +109,7 @@ services:
       start_period: 15m
 
   cron:
-    image: nextcloud:34.0.5-fpm
+    image: nextcloud:35.0.2-fpm
     volumes:
       - nextcloud:/var/www/html/
       - nextapps:/var/www/html/custom_apps:cached

release/next

@@ -0,0 +1,13 @@
+Upgrades Nextcloud from 34 to 35 (major version upgrade).
+
+IMPORTANT:
+- Do not skip major versions: your instance must be on the latest 34.x before
+  upgrading to 35.
+- Use `check_major_upgrade` (`abra app cmd <app-name> app check_major_upgrade`)
+  to check whether an instance is ready to upgrade to the next Nextcloud
+  major version.
+- Nextcloud does NOT support downgrades. Take a backup before deploying.
+- After deploying, check the logs and run any pending repair/upgrade steps:
+  `abra app cmd <app> app run_occ '"app:update --all"'`
+- Review app (plug-in) compatibility with Nextcloud 35 before upgrading; some
+  apps may need to be updated or temporarily disabled.