Reverts the string texture back to what it was before 26.1-snapshot 3

This resource pack helps to make string less visible like it was before in 1.21.11. It helps builders continue using string to block snow or other things from ruining a build.

String before 26.1-snapshot 3: !String before 26.1-snapshot 3

String after 26.1-snapshot 3: !String after 26.1-snapshot 3