iox-eclipse-iceoryx#921 Update code line length to match clang's

Signed-off-by: Ziad Mostafa <ziad.mostafa@apex.ai>

Author: Ziad Mostafa

.markdownlint.yaml

@@ -64,7 +64,7 @@ MD013:
   # Number of characters for headings
   heading_line_length: 100
   # Number of characters for code blocks
-  code_block_line_length: 100 # Ignored due to next option
+  code_block_line_length: 120 # Ignored due to next option
   # Include code blocks
   code_blocks: false
   # Include tables