Add multi architecture support for mediawiki

Add Architectures tag to support all the supported architectures by PHP

library/mediawiki

@@ -3,7 +3,7 @@ Maintainers: David Barratt <[email protected]> (@davidbarratt),
              addshore <[email protected]> (@addshore)
 GitRepo: https://github.com/wikimedia/mediawiki-docker.git
 GitCommit: 2dea40647eb85d6e0fc607904e0779644cf869c9
-Architectures: amd64, arm64v8
+Architectures: amd64, arm32v5, arm32v7, arm64v8, i386, ppc64le
 
 Tags: stable, latest, 1.31, 1.31.0
 Directory: stable