Fixed broken formatting in README.md and removed GitHub workflow scheduler

It turned out that scheduling GitHub workflow actions via cron is currently only supported for the default/master branch. For topic or release branches this setting has no effect so I removed it from release/rel_3 to avoid confusion.

Author: m0nk3y2k4

.github/workflows/maven.yml

@@ -6,8 +6,6 @@ name: Java CI with Maven
 on:
   push:
     branches: [ release/rel_3 ]
-  schedule:
-    - cron: '15 9 * * *'
 
 jobs:
   build:

README.md

@@ -74,7 +74,7 @@ the upcoming APIv4.
     - [x] [/series/{id}/episodes](https://api.thetvdb.com/swagger#!/Series/get_series_id_episodes)
     - [x] [/series/{id}/episodes/query](https://api.thetvdb.com/swagger#!/Series/get_series_id_episodes_query)
     - [x] [/series/{id}/episodes/query/params](https://api.thetvdb.com/swagger#!/Series/get_series_id_episodes_query_params)
-     [/series/{id}/episodes/summary](https://api.thetvdb.com/swagger#!/Series/get_series_id_episodes_summary)
+    - [x] [/series/{id}/episodes/summary](https://api.thetvdb.com/swagger#!/Series/get_series_id_episodes_summary)
     - [x] [/series/{id}/filter](https://api.thetvdb.com/swagger#!/Series/get_series_id_filter)
     - [x] [/series/{id}/filter/params](https://api.thetvdb.com/swagger#!/Series/get_series_id_filter_params)
     - [x] [/series/{id}/images](https://api.thetvdb.com/swagger#!/Series/get_series_id_images)