The change spoken form of word scope to sub (#2089)

Fixes #1918

## Checklist

- [-] I have added
[tests](https://www.cursorless.org/docs/contributing/test-case-recorder/)
- [x] I have updated the
[docs](https://github.com/cursorless-dev/cursorless/tree/main/docs) and
[cheatsheet](https://github.com/cursorless-dev/cursorless/tree/main/cursorless-talon/src/cheatsheet)
- [x] I have not broken the cheatsheet

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Co-authored-by: Pokey Rule <[email protected]>

Author: 2 people

src/spoken_forms.json

@@ -154,7 +154,7 @@
       "environment": "environment",
       "command": "command",
       "char": "character",
-      "word": "word",
+      "sub": "word",
       "token": "token",
       "identifier": "identifier",
       "line": "line",