Update manpage and completions.

Autogenerated by the [sponsors-maintainers-man-completions](https://github.com/Homebrew/brew/blob/HEAD/.github/workflows/sponsors-maintainers-man-completions.yml) workflow.

completions/bash/brew

@@ -672,6 +672,7 @@ _brew_contributions() {
   case "${cur}" in
     -*)
       __brewcomp "
+      --csv
       --debug
       --from
       --help

completions/fish/brew.fish

@@ -535,6 +535,7 @@ __fish_brew_complete_arg 'config' -l verbose -d 'Make some output more verbose'
 
 
 __fish_brew_complete_cmd 'contributions' 'Contributions to Homebrew repos for a user'
+__fish_brew_complete_arg 'contributions' -l csv -d 'Print a CSV of a user\'s contributions across repositories over the time period'
 __fish_brew_complete_arg 'contributions' -l debug -d 'Display any debugging information'
 __fish_brew_complete_arg 'contributions' -l from -d 'Date (ISO-8601 format) to start searching contributions'
 __fish_brew_complete_arg 'contributions' -l help -d 'Show this message'

completions/zsh/_brew

@@ -662,6 +662,7 @@ _brew_config() {
 # brew contributions
 _brew_contributions() {
   _arguments \
+    '--csv[Print a CSV of a user'\''s contributions across repositories over the time period]' \
     '--debug[Display any debugging information]' \
     '--from[Date (ISO-8601 format) to start searching contributions]' \
     '--help[Show this message]' \