[text-auditor] Batch fix untracked typo families in package manifest user-facing text

## Text Improvements

The following user-facing text issues were found in package manifest descriptions/titles. Each is a low-effort, unambiguous correction.

### 1. `Subcribed` → `Subscribed` typo family

**File:** `packages/ti_otx/data_stream/pulses_subscribed/manifest.yml` (line 1)
**Current text:** `title: Alienvault OTX Subcribed Pulses`
**Suggested fix:** `title: Alienvault OTX Subscribed Pulses`
**Why:** Clear spelling error in data stream title.

**File:** `packages/ti_otx/data_stream/pulses_subscribed/manifest.yml` (line 8)
**Current text:** `title: Alienvault OTX Subcribed Pulses`
**Suggested fix:** `title: Alienvault OTX Subscribed Pulses`
**Why:** Same typo in stream title.

**File:** `packages/ti_otx/data_stream/pulses_subscribed/manifest.yml` (line 9)
**Current text:** `description: Collect Alienvault OTX Indicators from Subcribed Pulses API`
**Suggested fix:** `description: Collect Alienvault OTX Indicators from Subscribed Pulses API`
**Why:** Same typo in stream description.

### 2. `Parellel` → `Parallel` typo family

**File:** `packages/servicenow/data_stream/event/manifest.yml` (line 379)
**Current text:** `title: Process Parellel of Parquet Decoding`
**Suggested fix:** `title: Process Parallel of Parquet Decoding`
**Why:** Clear spelling error in user-facing setting title.

**File:** `packages/amazon_security_lake/data_stream/event/manifest.yml` (line 53)
**Current text:** `title: Process Parellel of Parquet Decoding`
**Suggested fix:** `title: Process Parallel of Parquet Decoding`
**Why:** Same typo in equivalent user-facing setting title.

### 3. `deparment` → `department`

**File:** `packages/azure_billing/data_stream/billing/manifest.yml` (line 17)
**Current text:** `...It replaces the deparment ID scope if set.`
**Suggested fix:** `...It replaces the department ID scope if set.`
**Why:** Clear spelling error in configuration description.

### 4. `releated` → `related`

**File:** `packages/ti_mandiant_advantage/data_stream/threat_intelligence/manifest.yml` (line 83)
**Current text:** `title: Include releated reports`
**Suggested fix:** `title: Include related reports`
**Why:** Clear spelling error in setting title.

### 5. `numberic` → `numeric`

**File:** `packages/filestream/manifest.yml` (line 300)
**Current text:** `There are two supported suffix types in the input: numberic and date.`
**Suggested fix:** `There are two supported suffix types in the input: numeric and date.`
**Why:** Clear spelling error in user-facing configuration help text.

### 6. `extrenal` → `external`

**File:** `packages/tychon/data_stream/exposedservice/manifest.yml` (line 6)
**Current text:** `...help determine extrenal exposure for an endpoint.`
**Suggested fix:** `...help determine external exposure for an endpoint.`
**Why:** Clear spelling error in data stream description.

## Suggested Actions

- [ ] Replace all `Subcribed` occurrences with `Subscribed` in `packages/ti_otx/data_stream/pulses_subscribed/manifest.yml`.
- [ ] Replace `Parellel` with `Parallel` in both listed manifest titles.
- [ ] Replace `deparment` with `department` in Azure Billing manifest text.
- [ ] Replace `releated` with `related` in TI Mandiant Advantage manifest text.
- [ ] Replace `numberic` with `numeric` in filestream manifest help text.
- [ ] Replace `extrenal` with `external` in tychon exposedservice manifest text.

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