chore: fix warnings in comments/documentation of nft module (#11150)

## Description

Fix warnings in comments/documentation of nft module

---

### Author Checklist

*All items are required. Please add a note to the item if the item is not applicable and
please add links to any relevant follow up issues.*

I have...

- [ ] included the correct [type prefix](https://github.com/commitizen/conventional-commit-types/blob/v3.0.0/index.json) in the PR title
- [ ] added `!` to the type prefix if API or client breaking change
- [ ] targeted the correct branch (see [PR Targeting](https://github.com/cosmos/cosmos-sdk/blob/master/CONTRIBUTING.md#pr-targeting))
- [ ] provided a link to the relevant issue or specification
- [ ] followed the guidelines for [building modules](https://github.com/cosmos/cosmos-sdk/blob/master/docs/building-modules)
- [ ] included the necessary unit and integration [tests](https://github.com/cosmos/cosmos-sdk/blob/master/CONTRIBUTING.md#testing)
- [ ] added a changelog entry to `CHANGELOG.md`
- [ ] included comments for [documenting Go code](https://blog.golang.org/godoc)
- [ ] updated the relevant documentation or specification
- [ ] reviewed "Files changed" and left comments if necessary
- [ ] confirmed all CI checks have passed

### Reviewers Checklist

*All items are required. Please add a note if the item is not applicable and please add
your handle next to the items reviewed if you only reviewed selected items.*

I have...

- [ ] confirmed the correct [type prefix](https://github.com/commitizen/conventional-commit-types/blob/v3.0.0/index.json) in the PR title
- [ ] confirmed `!` in the type prefix if API or client breaking change
- [ ] confirmed all author checklist items have been addressed 
- [ ] reviewed state machine logic
- [ ] reviewed API design and naming
- [ ] reviewed documentation is accurate
- [ ] reviewed tests and test coverage
- [ ] manually tested (if applicable)

x/nft/keys.go

@@ -1,7 +1,7 @@
 package nft
 
 const (
-	// module name
+	// ModuleName module name
 	ModuleName = "nft"
 
 	// StoreKey is the default store key for nft

x/nft/msgs.go

@@ -14,7 +14,7 @@ var (
 	_ sdk.Msg = &MsgSend{}
 )
 
-// GetSigners implements the Msg.ValidateBasic method.
+// ValidateBasic implements the Msg.ValidateBasic method.
 func (m MsgSend) ValidateBasic() error {
 	if err := ValidateClassID(m.ClassId); err != nil {
 		return sdkerrors.Wrapf(ErrInvalidID, "Invalid class id (%s)", m.ClassId)

x/nft/simulation/operations.go

@@ -18,12 +18,12 @@ import (
 )
 
 const (
-	// Simulation operation weights constants
+	// OpWeightMsgSend Simulation operation weights constants
 	OpWeightMsgSend = "op_weight_msg_send"
 )
 
 const (
-	// nft operations weights
+	// WeightSend nft operations weights
 	WeightSend = 100
 )
 

x/nft/validation.go

@@ -1,7 +1,7 @@
 package nft
 
 import (
-	fmt "fmt"
+	"fmt"
 	"regexp"
 
 	sdkerrors "github.com/cosmos/cosmos-sdk/types/errors"