Update differences between code and help commands

[peko-hr]

Describe the bug

Description

• The actual source code and the behavior of the help command are different and need to be updated to avoid confusion.

prysm/cmd/beacon-chain/flags/base.go

Lines 23 to 26 in 6f79767

	MaxBuilderEpochMissedSlots = &cli.IntFlag{
	Name: "max-builder-epoch-missed-slots",
	Usage: "Number of total skip slot to fallback from using relay/builder to local execution engine for block construction in last epoch rolling window",
	}

To make it more friendly, Value should be included.
This should also be reflected in the official documentation.

🔬 Minimal Reproduction

1. Build Prysm. (Docker is also acceptable)
2. Show help command
3. Check max-builder-epoch-missed-slots

Platform(s)

Linux (x86), Mac (Apple Silicon)

What version of Prysm are you running? (Which release)

v5.0.3

[peko-hr]

The number to be defined is 5.
Is the number 5 appropriate?

prysm/config/params/mainnet_config.go

Line 265 in 6f79767

MaxBuilderEpochMissedSlots: 5,