[completion] Bump external repository to version 0.25.0

8cdf60b Updated rkt commands and arguments
f9d7d9d Implemented autocompletion for rkt pods and images (Fixes sorin-ionescu#465)
9feab39 Added completion for yarn
a63a098 Update completion for mix, add completion for mix test, fix completion for mix help
6285e0e Add completions for bitcoin-cli
0ed2e86 Set proper description for gist -r
df5a3a1 Try to follow the style guide
d7a2972 Add gist completion for read flag
b0cb2ad Added _rclone
b7c11f4 drop ripgrep completion
907cba3 Update repository infos
ccb53f4 Support newer versions of OpenSSL
f02dc8f add licence information
ceaff68 Add completion for ffind