[text-auditor] Batch fix clear user-facing typo families in O365 and Check Point text

## Text Improvements

The following user-facing text issues were found in the repository. Each is a low-effort fix.

### 1. Typo family: `upto` → `up to` in O365 metrics sync help text (4 occurrences)

**Current text:** `...can take upto 48h or more to be available...`

**Suggested fix:** `...can take up to 48h or more to be available...`

**Why:** `upto` is a clear misspelling in user-visible configuration/help text.

**Occurrences:**
- `packages/o365_metrics/data_stream/groups_activity_group_detail/manifest.yml` (line 41)
- `packages/o365_metrics/data_stream/viva_engage_groups_activity_group_detail/manifest.yml` (line 41)
- `packages/o365_metrics/data_stream/onedrive_usage_account_detail/manifest.yml` (line 41)
- `packages/o365_metrics/data_stream/teams_user_activity_user_detail/manifest.yml` (line 41)

### 2. Typo family: `Extention` → `Extension` in Check Point Harmony Endpoint field text (2 occurrences)

**Current text:** `Browser Extention version`

**Suggested fix:** `Browser Extension version`

**Why:** `Extention` is a clear misspelling in user-facing field descriptions/docs.

**Occurrences:**
- `packages/checkpoint_harmony_endpoint/data_stream/zerophishing/fields/fields.yml` (line 51)
- `packages/checkpoint_harmony_endpoint/docs/README.md` (line 1244)

## Suggested Actions

- [ ] Replace `upto` with `up to` in all four listed O365 metrics manifest descriptions.
- [ ] Replace `Extention` with `Extension` in both listed Check Point Harmony Endpoint occurrences.

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