Update wordpress example to use official images
Update wordpress example to use official images

The orchardup images are very old and not maintained.

Signed-off-by: Ben Firshman <73675debcd8a436be48ec22211dcf44fe0df0a64@firshman.co.uk>

schmunk42/compose,joeuo/docker.github.io,JimGalasyn/docker.github.io,londoncalling/docker.github.io,docker/docker.github.io,denverdino/denverdino.github.io,joeuo/docker.github.io,sanscontext/docker.github.io,thaJeztah/docker.github.io,johnstep/docker.github.io,bdwill/docker.github.io,joaofnfernandes/docker.github.io,phiroict/docker,menglingwei/denverdino.github.io,danix800/docker.github.io,gdevillele/docker.github.io,anweiss/docker.github.io,denverdino/compose,JimGalasyn/docker.github.io,shubheksha/docker.github.io,denverdino/denverdino.github.io,menglingwei/denverdino.github.io,docker-zh/docker.github.io,londoncalling/docker.github.io,denverdino/denverdino.github.io,sanscontext/docker.github.io,BSWANG/denverdino.github.io,phiroict/docker,dbdd4us/compose,phiroict/docker,michael-k/docker-compose,joaofnfernandes/docker.github.io,dbdd4us/compose,alexisbellido/docker.github.io,johnstep/docker.github.io,shubheksha/docker.github.io,jzwlqx/denverdino.github.io,danix800/docker.github.io,andrewgee/compose,thaJeztah/compose,jzwlqx/denverdino.github.io,shin-/docker.github.io,swoopla/compose,alexisbellido/docker.github.io,johnstep/docker.github.io,gdevillele/docker.github.io,shin-/docker.github.io,londoncalling/docker.github.io,funkyfuture/docker-compose,denverdino/denverdino.github.io,denverdino/denverdino.github.io,aduermael/docker.github.io,alexisbellido/docker.github.io,aduermael/docker.github.io,LuisBosquez/docker.github.io,anweiss/docker.github.io,vdemeester/compose,thaJeztah/docker.github.io,JimGalasyn/docker.github.io,londoncalling/docker.github.io,rillig/docker.github.io,denverdino/docker.github.io,troy0820/docker.github.io,bdwill/docker.github.io,sanscontext/docker.github.io,thaJeztah/docker.github.io,gdevillele/docker.github.io,rillig/docker.github.io,denverdino/docker.github.io,swoopla/compose,jzwlqx/denverdino.github.io,thaJeztah/docker.github.io,LuisBosquez/docker.github.io,shin-/compose,joaofnfernandes/docker.github.io,sdurrheimer/compose,jzwlqx/denverdino.github.io,rillig/docker.github.io,shin-/docker.github.io,bdwill/docker.github.io,BSWANG/denverdino.github.io,shubheksha/docker.github.io,rillig/docker.github.io,LuisBosquez/docker.github.io,hoogenm/compose,alexisbellido/docker.github.io,JimGalasyn/docker.github.io,BSWANG/denverdino.github.io,gdevillele/docker.github.io,menglingwei/denverdino.github.io,LuisBosquez/docker.github.io,thaJeztah/docker.github.io,JimGalasyn/docker.github.io,vdemeester/compose,menglingwei/denverdino.github.io,funkyfuture/docker-compose,schmunk42/compose,hoogenm/compose,anweiss/docker.github.io,jrabbit/compose,denverdino/docker.github.io,bdwill/docker.github.io,londoncalling/docker.github.io,jzwlqx/denverdino.github.io,shin-/docker.github.io,BSWANG/denverdino.github.io,joeuo/docker.github.io,troy0820/docker.github.io,BSWANG/denverdino.github.io,jrabbit/compose,thaJeztah/compose,joaofnfernandes/docker.github.io,phiroict/docker,troy0820/docker.github.io,docker/docker.github.io,anweiss/docker.github.io,docker/docker.github.io,docker-zh/docker.github.io,docker-zh/docker.github.io,gdevillele/docker.github.io,GM-Alex/compose,alexisbellido/docker.github.io,denverdino/docker.github.io,dnephin/compose,docker/docker.github.io,docker-zh/docker.github.io,aduermael/docker.github.io,danix800/docker.github.io,shubheksha/docker.github.io,denverdino/docker.github.io,sdurrheimer/compose,johnstep/docker.github.io,menglingwei/denverdino.github.io,shubheksha/docker.github.io,docker-zh/docker.github.io,LuisBosquez/docker.github.io,danix800/docker.github.io,joeuo/docker.github.io,dnephin/compose,denverdino/compose,joeuo/docker.github.io,andrewgee/compose,michael-k/docker-compose,phiroict/docker,sanscontext/docker.github.io,bdwill/docker.github.io,aduermael/docker.github.io,GM-Alex/compose,anweiss/docker.github.io,shin-/docker.github.io,johnstep/docker.github.io,joaofnfernandes/docker.github.io,troy0820/docker.github.io,shin-/compose,docker/docker.github.io,sanscontext/docker.github.io