update version to 3.4.3-SNAPSHOT

[ahmarsuhail]

Version bump to 3.4.3-SNAPSHOT

Description of PR

How was this patch tested?

For code changes:

• Does the title or this PR starts with the corresponding JIRA issue id (e.g. 'HADOOP-17799. Your PR title ...')?
• Object storage: have the integration tests been executed and the endpoint declared according to the connector-specific documentation?
• If adding new dependencies to the code, are these dependencies licensed in a way that is compatible for inclusion under ASF 2.0?
• If applicable, have you updated the LICENSE, LICENSE-binary, NOTICE-binary files?

[hadoop-yetus]

💔 -1 overall

Vote	Subsystem	Runtime	Logfile	Comment
+0 🆗	reexec	0m 0s		Docker mode activated.
-1 ❌	patch	0m 25s		#7731 does not apply to branch-3.4. Rebase required? Wrong Branch? See https://cwiki.apache.org/confluence/display/HADOOP/How+To+Contribute for help.

Subsystem	Report/Notes
GITHUB PR	#7731
Console output	https://ci-hadoop.apache.org/job/hadoop-multibranch/job/PR-7731/2/console
versions	git=2.34.1
Powered by	Apache Yetus 0.14.0 https://yetus.apache.org

This message was automatically generated.

[hadoop-yetus]

💔 -1 overall

Vote	Subsystem	Runtime	Logfile	Comment
+0 🆗	reexec	12m 20s		Docker mode activated.
-1 ❌	patch	0m 9s		#7731 does not apply to branch-3.4. Rebase required? Wrong Branch? See https://cwiki.apache.org/confluence/display/HADOOP/How+To+Contribute for help.

Subsystem	Report/Notes
Docker	ClientAPI=1.50 ServerAPI=1.50 base: https://ci-hadoop.apache.org/job/hadoop-multibranch/job/PR-7731/1/artifact/out/Dockerfile
GITHUB PR	#7731
Console output	https://ci-hadoop.apache.org/job/hadoop-multibranch/job/PR-7731/1/console
versions	git=2.25.1
Powered by	Apache Yetus 0.14.0 https://yetus.apache.org

This message was automatically generated.