doc/ci: Mark release 7.x as EOL

Author: antoineco

.github/workflows/update-merge.yml

@@ -8,7 +8,6 @@ on:
     branches:
       - update/main
       - update/tls
-      - update/release-7.x
       - update/release-8.x
 
 jobs:

.github/workflows/update.yml

@@ -14,7 +14,6 @@ jobs:
         branch:
           - main
           - tls
-          - release-7.x
           - release-8.x
 
     steps:

README.md

@@ -281,7 +281,7 @@ command.
 Older major versions are also supported on separate branches:
 
 * [`release-8.x`](https://github.com/deviantony/docker-elk/tree/release-8.x): 8.x series
-* [`release-7.x`](https://github.com/deviantony/docker-elk/tree/release-7.x): 7.x series
+* [`release-7.x`](https://github.com/deviantony/docker-elk/tree/release-7.x): 7.x series (End-of-Life)
 * [`release-6.x`](https://github.com/deviantony/docker-elk/tree/release-6.x): 6.x series (End-of-life)
 * [`release-5.x`](https://github.com/deviantony/docker-elk/tree/release-5.x): 5.x series (End-of-life)