Bump alpine from 3.19.4 to 3.19.6 in /src/test/resources/org/jvnet/hudson/plugins/platformlabeler/alpine/3.19.4

Bump alpine from 3.19.4 to 3.19.6 in /src/test/resources/org/jvnet/hudson/plugins/platformlabeler/alpine/3.19.4 #1306