Update yourls

Changes:

- https://github.com/YOURLS/docker-yourls/commit/bfcb6af: Remove volume instructions to exclude caching on host (https://github.com/YOURLS/docker-yourls/pull/36)

library/yourls

@@ -6,15 +6,15 @@ GitRepo: https://github.com/YOURLS/docker-yourls.git
 
 Tags: 1.7.6-apache, 1.7-apache, 1-apache, apache, 1.7.6, 1.7, 1, latest
 Architectures: amd64, arm32v5, arm32v7, arm64v8, i386, ppc64le
-GitCommit: d8beafb9313a62b4c6e1e8c223169198c33b81cc
+GitCommit: bfcb6afb84d742a7fd3a9053684fa295aae7d5ac
 Directory: apache
 
 Tags: 1.7.6-fpm, 1.7-fpm, 1-fpm, fpm
 Architectures: amd64, arm32v5, arm32v7, arm64v8, i386, ppc64le
-GitCommit: d8beafb9313a62b4c6e1e8c223169198c33b81cc
+GitCommit: bfcb6afb84d742a7fd3a9053684fa295aae7d5ac
 Directory: fpm
 
 Tags: 1.7.6-fpm-alpine, 1.7-fpm-alpine, 1-fpm-alpine, fpm-alpine
 Architectures: amd64, arm32v6, arm32v7, arm64v8, i386, ppc64le
-GitCommit: d8beafb9313a62b4c6e1e8c223169198c33b81cc
+GitCommit: bfcb6afb84d742a7fd3a9053684fa295aae7d5ac
 Directory: fpm-alpine