Fix assembly LICENSE formatting

Re: apache#4159 Use same indentation for slf4j-api LICENSE as the rest of
the file for the embedded LICENSE file in the assembly tarball

assemble/src/main/resources/LICENSE

@@ -677,27 +677,27 @@ to the terms and conditions of the following licenses.
 
 ## org.slf4j:slf4j-api
 
- Copyright (c) 2004-2023 QOS.ch
- All rights reserved.
-
- Permission is hereby granted, free  of charge, to any person obtaining
- a  copy  of this  software  and  associated  documentation files  (the
- "Software"), to  deal in  the Software without  restriction, including
- without limitation  the rights to  use, copy, modify,  merge, publish,
- distribute,  sublicense, and/or sell  copies of  the Software,  and to
- permit persons to whom the Software  is furnished to do so, subject to
- the following conditions:
-
- The  above  copyright  notice  and  this permission  notice  shall  be
- included in all copies or substantial portions of the Software.
-
- THE  SOFTWARE IS  PROVIDED  "AS  IS", WITHOUT  WARRANTY  OF ANY  KIND,
- EXPRESS OR  IMPLIED, INCLUDING  BUT NOT LIMITED  TO THE  WARRANTIES OF
- MERCHANTABILITY,    FITNESS    FOR    A   PARTICULAR    PURPOSE    AND
- NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
- LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
- OF CONTRACT, TORT OR OTHERWISE,  ARISING FROM, OUT OF OR IN CONNECTION
- WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+    Copyright (c) 2004-2023 QOS.ch
+    All rights reserved.
+
+    Permission is hereby granted, free  of charge, to any person obtaining
+    a  copy  of this  software  and  associated  documentation files  (the
+    "Software"), to  deal in  the Software without  restriction, including
+    without limitation  the rights to  use, copy, modify,  merge, publish,
+    distribute,  sublicense, and/or sell  copies of  the Software,  and to
+    permit persons to whom the Software  is furnished to do so, subject to
+    the following conditions:
+
+    The  above  copyright  notice  and  this permission  notice  shall  be
+    included in all copies or substantial portions of the Software.
+
+    THE  SOFTWARE IS  PROVIDED  "AS  IS", WITHOUT  WARRANTY  OF ANY  KIND,
+    EXPRESS OR  IMPLIED, INCLUDING  BUT NOT LIMITED  TO THE  WARRANTIES OF
+    MERCHANTABILITY,    FITNESS    FOR    A   PARTICULAR    PURPOSE    AND
+    NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+    LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+    OF CONTRACT, TORT OR OTHERWISE,  ARISING FROM, OUT OF OR IN CONNECTION
+    WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
 
 ## Various dependencies under the CC0 license / public domain