Fix spellcheck for benchmarking comments (#14535)

* Benchmarking spellcheck fix

Put everything that could cause spellcheck issues into backticks.

Signed-off-by: Oliver Tale-Yazdi <oliver.tale-yazdi@parity.io>

* Also in templates

Signed-off-by: Oliver Tale-Yazdi <oliver.tale-yazdi@parity.io>

* ".git/.scripts/commands/bench/bench.sh" pallet dev pallet-balances

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Signed-off-by: Oliver Tale-Yazdi <oliver.tale-yazdi@parity.io>
Co-authored-by: command-bot <>