clang-format: update latest spec and reformat

Copy the latest format file from the docs repository and apply.

Change-Id: I4113bd60a6817c8fdfad541c58e0910035a663ca
Signed-off-by: Patrick Williams <patrick@stwcx.xyz>
diff --git a/activation.hpp b/activation.hpp
index 31f7023..4f8e2c6 100644
--- a/activation.hpp
+++ b/activation.hpp
@@ -184,8 +184,8 @@
      *
      *  @return Success or exception thrown
      */
-    RequestedActivations
-        requestedActivation(RequestedActivations value) override;
+    RequestedActivations requestedActivation(
+        RequestedActivations value) override;
 
     /**
      * @brief subscribe to the systemd signals