[text-auditor] Batch fix clear untracked typo families in Nozomi and Azure OpenAI user-facing text

## Text Improvements

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

### 1. Typo family: `addres` → `address` (Nozomi Networks)

**File:** `packages/nozomi_networks/docs/README.md` (line 335)
**Current text:** `Source media access control (MAC) addres.`
**Suggested fix:** `Source media access control (MAC) address.`
**Why:** Clear spelling typo in user-facing package docs.

**File:** `packages/nozomi_networks/data_stream/alert/fields/fields.yml` (line 86)
**Current text:** `Source media access control (MAC) addres.`
**Suggested fix:** `Source media access control (MAC) address.`
**Why:** Same typo in the source field description.

### 2. Typo family: `Avaiable` → `Available` (Azure OpenAI)

**File:** `packages/azure_openai/docs/README.md` (line 362)
**Current text:** `Percentage of the prompt tokens hit the cache (Avaiable for PTU-managed).`
**Suggested fix:** `Percentage of the prompt tokens hit the cache (Available for PTU-managed).`
**Why:** Clear spelling typo in user-facing docs.

**File:** `packages/azure_openai/data_stream/metrics/fields/fields.yml` (line 35)
**Current text:** `Percentage of the prompt tokens hit the cache (Avaiable for PTU-managed).`
**Suggested fix:** `Percentage of the prompt tokens hit the cache (Available for PTU-managed).`
**Why:** Same typo in the source field description.

## Suggested Actions

- [ ] Replace `addres` with `address` in both Nozomi files listed above.
- [ ] Replace `Avaiable` with `Available` in both Azure OpenAI files listed above.

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