Make staker and validator description more clear

* staker: registered validator
* validator: committee member

tips/TIP-0048/openapi3-core.yaml

@@ -261,15 +261,15 @@ paths:
  get:
  tags:
  - validators
- summary: Returns information of all registered validators and if they are active, ordered by their holding stake.
+ summary: Returns information of all stakers (registered validators) and if they are active, ordered by their holding stake.
  parameters:
  - in: query
  name: pageSize
  schema:
  type: integer
  example: 1
  required: false
- description: The page number of validators.
+ description: The page number of stakers.
  - in: query
  name: cursor
  schema:
@@ -316,15 +316,15 @@ paths:
  get:
  tags:
  - validators
- summary: Return information about a validator.
+ summary: Return information about a staker (registered validator).
  parameters:
  - in: path
  name: bech32Address
  schema:
  type: string
  example: "rms1pqm4xk8e9ny5w5rxjkvtp249tfhlwvcshyr3pc0665jvp7g3hc875k538hl"
  required: true
- description: The Account Address of the account.
+ description: The Account Address of the staker.
  responses:
  '200':
  description: "Successful operation."
@@ -3270,7 +3270,7 @@ components:
  - parameters
 
  ValidatorsResponse:
- description: Returns a paginated list of all registered stakers ready for the next epoch and indicates if they were active recently (are eligible for committee selection).
+ description: Returns a paginated list of all stakers (registered validators) ready for the next epoch and indicates if they were active recently (are eligible for committee selection).
  properties:
  stakers:
  type: array
@@ -3320,7 +3320,7 @@ components:
  - $ref: '#/components/schemas/CommitteeMember'
 
  CommitteeMember:
- description: Returns information of a committee member.
+ description: Returns information of a validator (committee member).
  properties:
  address: 
  type: string
@@ -3336,32 +3336,32 @@ components:
  description: The fixed cost of the validator, which it receives as part of its Mana rewards.
 
  Validator:
- description: Returns information of a validator.
+ description: Returns information of a staker (registered validator).
  properties:
  address: 
  type: string
- description: The account address of the validator.
+ description: The account address of the staker.
  stakingEndEpoch:
  type: integer
- description: The epoch index until which the validator registered to stake.
+ description: The epoch index until which the staker registered to stake.
  poolStake:
  type: string
  description: The total stake of the pool, including delegators.
  validatorStake:
  type: string
- description: The stake of a validator.
+ description: The stake of a staker.
  fixedCost:
  type: string
- description: The fixed cost of the validator, which it receives as part of its Mana rewards.
+ description: The fixed cost of the staker, which it receives as part of its Mana rewards.
  active:
  type: boolean
- description: Shows whether validator was active recently.
+ description: Shows whether staker was active recently.
  latestSupportedProtocolVersion:
  type: integer
- description: The latest protocol version the validator supported.
+ description: The latest protocol version the staker supported.
  latestSupportedProtocolHash:
  type: string
- description: The latest protocol hash the validator supported.
+ description: The latest protocol hash the staker supported.
  required:
  - address
  - stakingEndEpoch