Fix typos in documentation

[donatik27]

Changes Made

1. docs/sdk/resources/substrate/gear.md

• Changed "endpint" to "endpoint"
• Line affected: SQD Network has gateways for two networks that use Gear Protocol: **Vara** and **Vara Testnet**. Here are their endpoint URLs:

2. docs/squid-cli/tags.md

• Changed "deployements" to "deployments"
• Line affected: Manage squid deployments tags. See the [slots and tags guide](/cloud/resources/slots-and-tags).

3. docs/tron-indexing/tron-batch-processor/logs.md

• Changed "transacton" to "transaction"
• Line affected: - 'transaction = true': will retrieve the parent transaction for each selected log.

Reason for Changes

These changes fix spelling errors in the documentation to improve readability and maintain professional quality. Correct spelling is crucial for:

1. Better user comprehension
2. Maintaining documentation professionalism
3. Avoiding confusion for non-native English speakers
4. Ensuring technical accuracy