chore: fix spelling issues (libp2p#5522)

Hello
I found several spelling issues in your docs.
Br, Elias.

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Co-authored-by: mergify[bot] <37929162+mergify[bot]@users.noreply.github.com>

docs/maintainer-handbook.md

@@ -31,7 +31,7 @@ This will have mergify approve your PR, thus fulfilling all requirements to auto
 Our CI checks that each crate which is modified gets a changelog entry.
 Whilst this is a good default safety-wise, it creates a lot of false-positives for changes that are internal and don't need a changelog entry.
 
-For PRs that in the categories `chore`, `deps`, `refactor` and `docs`, this check is disabled automatically.
+For PRs in the categories `chore`, `deps`, `refactor` and `docs`, this check is disabled automatically.
 Any other PR needs to explicitly disable this check if desired by applying the `internal-change` label.
 
 ## Dependencies

examples/ipfs-kad/README.md

@@ -87,5 +87,5 @@ Failed to insert the PK record
 ## Conclusion
 
 In conclusion, this example provides a practical demonstration of using the Rust P2P Library to interact with the Kademlia protocol on the IPFS network.
-By examining the code and running the example, users can gain insights into the inner workings of Kademlia and how it performs various basic actions like getting the closes peers or inserting records into the DHT.
+By examining the code and running the example, users can gain insights into the inner workings of Kademlia and how it performs various basic actions like getting the closest peers or inserting records into the DHT.
 This knowledge can be valuable when developing peer-to-peer applications or understanding decentralized networks.

wasm-tests/README.md

@@ -8,4 +8,4 @@ Before you run the tests you need to install the following:
 
 # Run tests
 
-Just call `run-all.sh` or `run.sh` in the test directory you are interested.
+Just call `run-all.sh` or `run.sh` in the test directory if you are interested.