Merge pull request #3 from DasRoteSkelett/main

fixing license tag in package.xml to conform to SPDX

Author: nbbrooks

tcb_span/package.xml

@@ -6,7 +6,7 @@
   <description>Implementation of C++20's std::span</description>
   <maintainer email="[email protected]">Tyler Weaver</maintainer>
 
-  <license>Boost Software License</license>
+  <license>BSL-1.0</license>
   <url>https://github.com/tcbrindle/span</url>
 
   <buildtool_depend>ament_cmake</buildtool_depend>

tl_expected/package.xml

@@ -7,7 +7,7 @@
   <maintainer email="[email protected]">Tyler Weaver</maintainer>
 
   <author>Sy Brand</author>
-  <license>Creative Commons Zero v1.0 Universal</license>
+  <license>CC0-1.0</license>
   <url>https://github.com/TartanLlama/expected</url>
 
   <buildtool_depend>ament_cmake</buildtool_depend>