chore: regenerate skills from Discovery API

Author: jpoehnelt

.changeset/sync-skills.md

@@ -0,0 +1,5 @@
+---
+"@googleworkspace/cli": patch
+---
+
+Sync generated skills with latest Google Discovery API specs

skills/gws-sheets-append/SKILL.md

@@ -30,7 +30,7 @@ gws sheets +append --spreadsheet <ID>
 | `--spreadsheet` | ✓ | — | Spreadsheet ID |
 | `--values` | — | — | Comma-separated values (simple strings) |
 | `--json-values` | — | — | JSON array of rows, e.g. '[["a","b"],["c","d"]]' |
-| `--range` | — | `A1` | Target range in A1 notation (e.g. 'Sheet2!A1') to select a specific tab |
+| `--range` | — | — | Target range in A1 notation (e.g. 'Sheet2!A1'). Defaults to 'A1' (first sheet) |
 
 ## Examples
 
@@ -44,7 +44,7 @@ gws sheets +append --spreadsheet ID --range "Sheet2!A1" --values 'Alice,100'
 
 - Use --values for simple single-row appends.
 - Use --json-values for bulk multi-row inserts.
-- Use --range to append to a specific sheet tab (default: A1, i.e. first sheet).
+- Use --range to target a specific sheet tab (default: A1, i.e. first sheet).
 
 > [!CAUTION]
 > This is a **write** command — confirm with the user before executing.