Fix filters heading
Fix filters heading

chosenken/docs,bluecmd/prometheus-docs,dato/prometheus-docs,jimmidyson/docs,open-falcon/open-falcon.github.io,dln/docs,dln/docs,Cepave/openfalcon.io,tcolgate/docs,jmptrader/docs,prometheus/docs,pdbogen/docs,ChaoticMind/docs,dato/prometheus-docs,bluecmd/prometheus-docs,ChaoticMind/docs,open-falcon/open-falcon.github.io,evanphx/docs,open-falcon/open-falcon.github.io,ddfreyne/prometheus-docs,tcolgate/docs,jimmidyson/docs,du2016/prometheus-docs,jmptrader/docs,chosenken/docs,chosenken/docs,evanphx/docs,vic3lord/docs,tcolgate/docs,jimmidyson/docs,ddfreyne/prometheus-docs,jmptrader/docs,prometheus/docs,evanphx/docs,du2016/prometheus-docs,vic3lord/docs,ChaoticMind/docs,chosenken/docs,dato/prometheus-docs,Cepave/openfalcon.io,prometheus/docs,dln/docs,pdbogen/docs,vic3lord/docs,ddfreyne/prometheus-docs,du2016/prometheus-docs,pdbogen/docs,ddfreyne/prometheus-docs,bluecmd/prometheus-docs,Cepave/openfalcon.io