docs: update url for log parser in how-to-import-kata-logs-with-fluentd.md
fixed the log parser url to kata 2.x path
(https://github.com/kata-containers/tests/tree/main)
for the How to import Kata Containers logs into Fluentd Doc.
Fixes
@@ -178,7 +178,7 @@ sub-filter on, for instance, the `SYSLOG_IDENTIFIER` to differentiate the Kata c
on the `PRIORITY` to filter out critical issues etc.
Kata generates a significant amount of Kata specific information, which can be seen as
-[`logfmt`](https://github.com/kata-containers/tests/tree/master/cmd/log-parser#logfile-requirements).
+[`logfmt`](https://github.com/kata-containers/tests/tree/main/cmd/log-parser#logfile-requirements).
data contained in the `MESSAGE` field. Imported as-is, there is no easy way to filter on that data
in Kibana:
