fix(docs): use git pull instead of git fetch in pre-switch hook example (#1323)

## Summary

- Change the `pre-switch` hook example from `git fetch` to `git pull`
- `git fetch` only updates remote tracking refs without advancing the
local branch, so a new worktree created after fetch is still based on
the old local HEAD — not the latest remote

Reported by @jdb8 in #1085.

## Test plan

- [x] Doc sync test passes (docs and skill reference updated
automatically)

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-authored-by: worktrunk-bot <254187624+worktrunk-bot@users.noreply.github.com>
Co-authored-by: Claude Opus 4.6 <noreply@anthropic.com>

Author: worktrunk-bot

docs/content/hook.md

@@ -40,11 +40,11 @@ Runs before every `wt switch` — before branch validation or worktree creation.
 
 ```toml
 [pre-switch]
-# Fetch if last fetch was more than 6 hours ago
-fetch = """
+# Pull if last fetch was more than 6 hours ago
+pull = """
 FETCH_HEAD="$(git rev-parse --git-common-dir)/FETCH_HEAD"
 if [ "$(find "$FETCH_HEAD" -mmin +360 2>/dev/null)" ] || [ ! -f "$FETCH_HEAD" ]; then
-    git fetch
+    git pull
 fi
 """
 ```

skills/worktrunk/reference/hook.md

@@ -31,11 +31,11 @@ Runs before every `wt switch` — before branch validation or worktree creation.
 
 ```toml
 [pre-switch]
-# Fetch if last fetch was more than 6 hours ago
-fetch = """
+# Pull if last fetch was more than 6 hours ago
+pull = """
 FETCH_HEAD="$(git rev-parse --git-common-dir)/FETCH_HEAD"
 if [ "$(find "$FETCH_HEAD" -mmin +360 2>/dev/null)" ] || [ ! -f "$FETCH_HEAD" ]; then
-    git fetch
+    git pull
 fi
 """
 ```

src/cli/mod.rs

@@ -1080,11 +1080,11 @@ Runs before every `wt switch` — before branch validation or worktree creation.
 
 ```toml
 [pre-switch]
-# Fetch if last fetch was more than 6 hours ago
-fetch = """
+# Pull if last fetch was more than 6 hours ago
+pull = """
 FETCH_HEAD="$(git rev-parse --git-common-dir)/FETCH_HEAD"
 if [ "$(find "$FETCH_HEAD" -mmin +360 2>/dev/null)" ] || [ ! -f "$FETCH_HEAD" ]; then
-    git fetch
+    git pull
 fi
 """
 ```