docr add crystal 1.9.2 failed.

[zw963]

 ╰─ $ docr add crystal 1.9.2
(i) importing crystal version 1.9.2
(i) fetching available versions...
(!) crystal version 1.9.2 is not available
(!) run 'docr check' to see available versions of imported libraries

 ╰─ $ crystal version
Crystal 1.9.2 [1908c816f] (2023-07-19)

LLVM: 15.0.7
Default target: x86_64-pc-linux-gnu

Current Crystal version is 1.9.2, was compiled on my local with document.

In fact, docr check command not available too.