Update adminer

This includes the following changes:
- Detect `adminer.css` request by DOCUMENT_URI (TimWolla/docker-adminer@b8632301cfc1d850ffcc0672f5d36b005a5752ea)

library/adminer

@@ -5,10 +5,10 @@ GitRepo: https://github.com/TimWolla/docker-adminer.git
 
 Tags: 4.7.4-standalone, 4.7-standalone, 4-standalone, standalone, 4.7.4, 4.7, 4, latest
 Architectures: amd64, arm32v6, arm32v7, arm64v8, i386, ppc64le
-GitCommit: 23afa49cd499fc926c1e59e06ad342d025be2292
+GitCommit: d564e3ea7af5d3335527d9b9eab30555967e458f
 Directory: 4
 
 Tags: 4.7.4-fastcgi, 4.7-fastcgi, 4-fastcgi, fastcgi
 Architectures: amd64, arm32v6, arm32v7, arm64v8, i386, ppc64le
-GitCommit: 23afa49cd499fc926c1e59e06ad342d025be2292
+GitCommit: b8632301cfc1d850ffcc0672f5d36b005a5752ea
 Directory: 4/fastcgi