refactor: Add license information to files (#3093)

blog/author/dngray.md

@@ -1,3 +1,9 @@
+<!--
+SPDX-FileCopyrightText: 2025 Freddy <freddy@privacyguides.org>
+
+SPDX-License-Identifier: CC-BY-SA-4.0
+-->
+
 # Daniel Gray
 
 ![Profile picture](https://github.com/dngray.png){ align=right }

blog/author/em.md

@@ -1,4 +1,7 @@
 ---
+# SPDX-FileCopyrightText: 2024 Jonah Aragon <jonah@privacyguides.org>
+#
+# SPDX-License-Identifier: CC-BY-SA-4.0
 description: Em is a full-time journalist at Privacy Guides.
 schema:
   -

blog/author/freddy.md

@@ -1,3 +1,9 @@
+<!--
+SPDX-FileCopyrightText: 2025 Freddy <freddy@privacyguides.org>
+
+SPDX-License-Identifier: CC-BY-SA-4.0
+-->
+
 # Freddy
 
 ![Profile picture](https://github.com/freddy-m.png){ align=right }

blog/author/jonah.md

@@ -1,4 +1,7 @@
 ---
+# SPDX-FileCopyrightText: 2024 Jonah Aragon <jonah@privacyguides.org>
+#
+# SPDX-License-Identifier: CC-BY-SA-4.0
 description: Jonah Aragon is the Project Director and staff writer at Privacy Guides. His role includes researching and writing for this website, system administration, creating Privacy Guides Online Learning course content, reviewing the products recommended here, and most other day-to-day tasks.
 schema:
   -

blog/author/niek-de-wilde.md

@@ -1,3 +1,9 @@
+<!--
+SPDX-FileCopyrightText: 2024 Niek de Wilde <niek@privacyguides.org>
+
+SPDX-License-Identifier: CC-BY-SA-4.0
+-->
+
 # Niek de Wilde
 
 ![Profile picture](https://github.com/blacklight447.png){ align=right }