Update to Adminer 4.8.1

Resolves TimWolla/docker-adminer#103

library/adminer

@@ -3,12 +3,12 @@
 Maintainers: Tim Düsterhus <[email protected]> (@TimWolla)
 GitRepo: https://github.com/TimWolla/docker-adminer.git
 
-Tags: 4.8.0-standalone, 4-standalone, standalone, 4.8.0, 4, latest
+Tags: 4.8.1-standalone, 4-standalone, standalone, 4.8.1, 4, latest
 Architectures: amd64, arm32v6, arm32v7, arm64v8, i386, ppc64le, s390x
-GitCommit: 40a2516bf4f95dc76a839b8b76e4a5eae2378e67
+GitCommit: 9957ca52b8f442213fb116503dc7d0e18d4dc228
 Directory: 4
 
-Tags: 4.8.0-fastcgi, 4-fastcgi, fastcgi
+Tags: 4.8.1-fastcgi, 4-fastcgi, fastcgi
 Architectures: amd64, arm32v6, arm32v7, arm64v8, i386, ppc64le, s390x
-GitCommit: 40a2516bf4f95dc76a839b8b76e4a5eae2378e67
+GitCommit: 9957ca52b8f442213fb116503dc7d0e18d4dc228
 Directory: 4/fastcgi