RFC: add opentelemetry support

Signed-off-by: qiaoleiatms <[email protected]>

text/0000-opentelemetry-metrics.md

@@ -95,6 +95,7 @@ Instead, lifecycle should generate the parsable report of phases and buildpacks,
     ]
 }
 ```
+
 Meanwhile, a `collect` phase should be supported by buildpack extension to collect the report file.
 
 # Prior Art