docs: update usage docs to use correct major version

Author: dhensby

README.md

@@ -7,7 +7,7 @@ This action installs a version of SQL Server on Windows based GitHub Action Runn
 See [action.yml](./action.yml):
 <!-- start usage -->
 ```yaml
-- uses: tediousjs/setup-sqlserver@v1
+- uses: tediousjs/setup-sqlserver@v2
   with:
     # Skip OS checks that will stop installation attempts preemptively.
     # Default: false

misc/generate-docs.ts

@@ -2,6 +2,7 @@ import * as fs from 'fs';
 import * as os from 'os';
 import * as path from 'path';
 import * as yaml from 'js-yaml';
+import { version } from '../package.json';
 
 /**
  * From @actions/checkout
@@ -164,7 +165,7 @@ function updateUsage(
 }
 
 updateUsage(
-    'tediousjs/setup-sqlserver@v1',
+    `tediousjs/setup-sqlserver@v${version.split('.')[0]}`,
     path.join(__dirname, '..', 'action.yml'),
     path.join(__dirname, '..', 'README.md')
 );