docs: format README a little

Signed-off-by: Lars Wirzenius <liw@liw.fi>

README.md

@@ -17,10 +17,12 @@ shell: |
 
  [Radicle CI broker]: https://app.radicle.xyz/nodes/radicle.liw.fi/rad:zwTxygwuz5LDGBq255RA2CbNGrz8
 
+
 ## Architecture
 
 See the [documentation](doc) directory for an architecture document.
 
+
 ## Configuration
 
 The adapter requires the `RADICLE_NATIVE_CI` environment variable to
@@ -44,6 +46,7 @@ There is simple, simplistic, rudimentary, personal-use-only packaging
 for Debian in the `debian` directory, used by Lars to build packages
 for his own use.
 
+
 ## Running tests
 
 To run the test suite for the CI broker: