build: move inlined script to file in _tools/scripts

---
type: pre_commit_static_analysis_report
description: Results of running static analysis checks when committing changes.
report:
  - task: lint_filenames
    status: passed
  - task: lint_editorconfig
    status: passed
  - task: lint_markdown
    status: na
  - task: lint_package_json
    status: na
  - task: lint_repl_help
    status: na
  - task: lint_javascript_src
    status: passed
  - task: lint_javascript_cli
    status: na
  - task: lint_javascript_examples
    status: na
  - task: lint_javascript_tests
    status: na
  - task: lint_javascript_benchmarks
    status: na
  - task: lint_python
    status: na
  - task: lint_r
    status: na
  - task: lint_c_src
    status: na
  - task: lint_c_examples
    status: na
  - task: lint_c_benchmarks
    status: na
  - task: lint_c_tests_fixtures
    status: na
  - task: lint_shell
    status: na
  - task: lint_typescript_declarations
    status: na
  - task: lint_typescript_tests
    status: na
  - task: lint_license_headers
    status: passed
---

Author: Planeshifter

.github/workflows/generate_monthly_changelog.yml

@@ -101,18 +101,7 @@ jobs:
       - name: 'Generate changelog for last month'
         run: |
           UNTIL=$(date +"%Y-%m-01")
-          node -e "
-          var generate = require( '@stdlib/_tools/changelog/generate' );
-          var changelog = generate( '@stdlib', {
-            'flags': {
-              'since': '$UNTIL - 1 month',
-              'until': '$UNTIL'
-            },
-            'format': 'aggregated'
-          });
-          console.log( changelog.content );
-
-          " > ./www-blog-monthly-changelog/monthly_changelog_${UNTIL//-/_}.md
+          node lib/node_modules/@stdlib/_tools/scripts/generate_monthly_changelog.js > ./www-blog-monthly-changelog/monthly_changelog_${UNTIL//-/_}.md
 
       # Import GPG key to sign commits:
       - name: 'Import GPG key to sign commits'

lib/node_modules/@stdlib/_tools/scripts/generate_monthly_changelog.js

@@ -0,0 +1,40 @@
+#!/usr/bin/env node
+
+/**
+* @license Apache-2.0
+*
+* Copyright (c) 2025 The Stdlib Authors.
+*
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at
+*
+*    http://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*/
+
+/* eslint-disable no-console */
+
+'use strict';
+
+// MODULES //
+
+var generate = require( '@stdlib/_tools/changelog/generate' );
+
+
+// MAIN //
+
+var changelog = generate( '@stdlib', {
+	'flags': {
+		'since': '$UNTIL - 1 month',
+		'until': '$UNTIL'
+	},
+	'format': 'aggregated'
+});
+
+console.log( changelog.content );