docs: tweak README formatting
docs: tweak README formatting

Added code tags on several paths and commands.
TheMrMilchmann/lwjgl3,code-disaster/lwjgl3,LWJGL/lwjgl3,LWJGL-CI/lwjgl3,TheMrMilchmann/lwjgl3,code-disaster/lwjgl3,LWJGL/lwjgl3,TheMrMilchmann/lwjgl3,LWJGL/lwjgl3,LWJGL-CI/lwjgl3,code-disaster/lwjgl3,LWJGL-CI/lwjgl3,LWJGL-CI/lwjgl3,code-disaster/lwjgl3,LWJGL/lwjgl3,TheMrMilchmann/lwjgl3