Update Backdrop

Update Backdrop to the latest release, version 1.11.3.

library/backdrop

@@ -5,10 +5,10 @@ GitRepo: https://github.com/backdrop-ops/backdrop-docker.git
 
 Tags: 1.10.1, 1.10, 1, 1.10.1-apache, 1.10-apache, 1-apache, apache, latest
 Architectures: amd64, arm64v8
-GitCommit: de93346a2c589bd6fc7de4f4de784fdd17ddaaf9
+GitCommit: 6e10ccf33adf2b59c8197336e510688a49e342f8
 Directory: 1/apache
 
 Tags: 1.10.1-fpm, 1.10-fpm, 1-fpm, fpm
 Architectures: amd64, arm64v8
-GitCommit: de93346a2c589bd6fc7de4f4de784fdd17ddaaf9
+GitCommit: 6e10ccf33adf2b59c8197336e510688a49e342f8
 Directory: 1/fpm