Bump version to 3.1

Author: linozen

CHANGELOG.md

@@ -22,6 +22,15 @@ The versions follow [semantic versioning](https://semver.org).
 
 ## Unreleased - YYYY-MM-DD
 
+### Changed
+### Deprecated
+### Removed
+### Fixed
+### Security
+### Added
+
+## 3.1 - 2023-06-21
+
 ### Added
 
 - Definition for Commentable and Uncommentable Files. (#123, thanks @Jayman2000)
@@ -59,16 +68,10 @@ The versions follow [semantic versioning](https://semver.org).
 
 - Bump referenced SPDX version to 2.3, and update links. (#103) (#107)
 
-### Deprecated
-
-### Removed
-
 ### Fixed
 
 - Minor typos and grammar mistakes. Thanks @jlovejoy and @Jayman2000!
 
-### Security
-
 
 ## 3.0 - 2019-08-07
 

spec.md

@@ -2,7 +2,7 @@
 # SPDX-FileCopyrightText: 2019 Free Software Foundation Europe e.V.
 # SPDX-License-Identifier: CC-BY-SA-4.0
 
-title: "REUSE Specification – Version 3.0"
+title: "REUSE Specification – Version 3.1"
 ---
 
 This specification defines a standardized method for declaring copyright and