Add SpacesInLineCommentPrefix key to ClangFormat configuration

The previous ClangFormat configuration was developed for use with ClangFormat 11.0.1. The version of ClangFormat now in
use by Arduino tools is 14.0.0.

This configuration key was added in the interim.

The key value set here was chosen in order to:

- Align with the permissive behavior of the Arduino IDE 1.x "Auto Format" feature.

Author: per1234

other/clang-format-configuration/.clang-format

@@ -167,6 +167,9 @@ SpacesInAngles: Leave
 SpacesInCStyleCastParentheses: false
 SpacesInConditionalStatement: false
 SpacesInContainerLiterals: false
+SpacesInLineCommentPrefix:
+  Minimum: 0
+  Maximum: -1
 SpacesInParentheses: false
 SpacesInSquareBrackets: false
 Standard: Auto