fix reference to commit we vendored from

Author: lbloder

sentry-async-profiler/src/main/java/io/sentry/asyncprofiler/vendor/asyncprofiler/README.md

@@ -1,4 +1,4 @@
 # Vendored AsyncProfiler code for converting JFR Files
-- Vendored-in from commit fe1bc66d4b6181413847f6bbe5c0db805f3e9194 of repository: git@github.com:async-profiler/async-profiler.git
+- Vendored-in from commit https://github.com/async-profiler/async-profiler/tree/fe1bc66d4b6181413847f6bbe5c0db805f3e9194 
 - Only the code related to JFR conversion is included.
 - The `AsyncProfiler` itself is included as a dependency in the Maven project.