Use arm32v6 arch instead of arm32v7 for alpine.

Also add arm32v6 for other tags.

library/convertigo

@@ -3,17 +3,17 @@ GitRepo: https://github.com/convertigo/docker
 GitCommit: 1b3f1092aae7fbfd1094fb169be1e74f0902a164
 
 Tags: 7.5.0, 7.5, latest
-Architectures: amd64, arm32v7, arm64v8, i386
+Architectures: amd64, arm32v6, arm32v7, arm64v8, i386
 Directory: 7.5/7.5.0
 
 Tags: 7.5.0-alpine, 7.5-alpine, alpine
-Architectures: amd64, arm32v7, arm64v8, i386
+Architectures: amd64, arm32v6, arm64v8, i386
 Directory: 7.5/7.5.0/alpine
 
 Tags: 7.4.7, 7.4
-Architectures: amd64, arm32v7, arm64v8, i386
+Architectures: amd64, arm32v6, arm32v7, arm64v8, i386
 Directory: 7.4/7.4.7
 
 Tags: 7.4.7-alpine, 7.4-alpine
-Architectures: amd64, arm32v7, arm64v8, i386
+Architectures: amd64, arm32v6, arm64v8, i386
 Directory: 7.4/7.4.7/alpine