Fix typos in documentation

[Marcofann]

This PR addresses various typos found in documentation and source files across the codebase. These changes improve clarity and maintain consistency in comments and documentation. The updates do not affect functionality or logic.

Files and Changes:

• docs/architecture/adr-004-light-client-cli.md
  • Corrected "double checked" to "double-checked."
• docs/architecture/adr-008-event-subscription.md
  • Fixed "an value" to "a value."
• docs/spec/lightclient/detection/README.md
  • Corrected "state an move forward" to "state a move forward."
• rpc/src/client/transport/auth.rs
  • Fixed "authorizing a HTTP" to "authorizing an HTTP."
• rpc/src/serializers/tm_hash_base64.rs
  • Corrected "an tendermint::Hash" to "a tendermint::Hash."