Bump version from "7.4.0-alpha.2" to "7.4.0" [skip ci]

Author: storybook-bot

code/addons/a11y/package.json

@@ -1,6 +1,6 @@
 {
   "name": "@storybook/addon-a11y",
-  "version": "7.4.0-alpha.2",
+  "version": "7.4.0",
   "description": "Test component compliance with web accessibility standards",
   "keywords": [
     "a11y",

code/addons/actions/package.json

@@ -1,6 +1,6 @@
 {
   "name": "@storybook/addon-actions",
-  "version": "7.4.0-alpha.2",
+  "version": "7.4.0",
   "description": "Get UI feedback when an action is performed on an interactive element",
   "keywords": [
     "storybook",

code/addons/backgrounds/package.json

@@ -1,6 +1,6 @@
 {
   "name": "@storybook/addon-backgrounds",
-  "version": "7.4.0-alpha.2",
+  "version": "7.4.0",
   "description": "Switch backgrounds to view components in different settings",
   "keywords": [
     "addon",

code/addons/controls/package.json

@@ -1,6 +1,6 @@
 {
   "name": "@storybook/addon-controls",
-  "version": "7.4.0-alpha.2",
+  "version": "7.4.0",
   "description": "Interact with component inputs dynamically in the Storybook UI",
   "keywords": [
     "addon",

code/addons/docs/package.json

@@ -1,6 +1,6 @@
 {
   "name": "@storybook/addon-docs",
-  "version": "7.4.0-alpha.2",
+  "version": "7.4.0",
   "description": "Document component usage and properties in Markdown",
   "keywords": [
     "addon",

code/addons/essentials/package.json

@@ -1,6 +1,6 @@
 {
   "name": "@storybook/addon-essentials",
-  "version": "7.4.0-alpha.2",
+  "version": "7.4.0",
   "description": "Curated addons to bring out the best of Storybook",
   "keywords": [
     "addon",

code/addons/gfm/package.json

@@ -1,6 +1,6 @@
 {
   "name": "@storybook/addon-mdx-gfm",
-  "version": "7.4.0-alpha.2",
+  "version": "7.4.0",
   "description": "GitHub Flavored Markdown in Storybook",
   "keywords": [
     "addon",

code/addons/highlight/package.json

@@ -1,6 +1,6 @@
 {
   "name": "@storybook/addon-highlight",
-  "version": "7.4.0-alpha.2",
+  "version": "7.4.0",
   "description": "Highlight DOM nodes within your stories",
   "keywords": [
     "storybook-addons",

code/addons/interactions/package.json

@@ -1,6 +1,6 @@
 {
   "name": "@storybook/addon-interactions",
-  "version": "7.4.0-alpha.2",
+  "version": "7.4.0",
   "description": "Automate, test and debug user interactions",
   "keywords": [
     "storybook-addons",

code/addons/jest/package.json

@@ -1,6 +1,6 @@
 {
   "name": "@storybook/addon-jest",
-  "version": "7.4.0-alpha.2",
+  "version": "7.4.0",
   "description": "React storybook addon that show component jest report",
   "keywords": [
     "addon",