TEZ-4614: Fix CSS selector in em-table.less

[dk2k]

No description provided.

[tez-yetus]

🎊 +1 overall

Vote	Subsystem	Runtime	Comment
+0 🆗	reexec	22m 56s	Docker mode activated.
		_ Prechecks _
+1 💚	dupname	0m 0s	No case conflicting files found.
+1 💚	@author	0m 0s	The patch does not contain any @author tags.
		_ master Compile Tests _
		_ Patch Compile Tests _
+1 💚	whitespace	0m 0s	The patch has no whitespace issues.
		_ Other Tests _
+1 💚	asflicense	0m 51s	The patch does not generate ASF License warnings.
		24m 27s

Subsystem	Report/Notes
Docker	ClientAPI=1.48 ServerAPI=1.48 base: https://ci-hadoop.apache.org/job/tez-multibranch/job/PR-398/1/artifact/out/Dockerfile
GITHUB PR	#398
Optional Tests	dupname asflicense
uname	Linux 2e9fb5e13069 5.15.0-134-generic #145-Ubuntu SMP Wed Feb 12 20:08:39 UTC 2025 x86_64 x86_64 x86_64 GNU/Linux
Build tool	maven
Personality	personality/tez.sh
git revision	master / c34ec16
Max. process+thread count	51 (vs. ulimit of 5500)
modules	C: tez-ui U: tez-ui
Console output	https://ci-hadoop.apache.org/job/tez-multibranch/job/PR-398/1/console
versions	git=2.34.1 maven=3.6.3
Powered by	Apache Yetus 0.12.0 https://yetus.apache.org

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[abstractdog]

thanks for the contribution @dk2k, can you please create a Jira for this? https://issues.apache.org/

[ayushtkn]

LGTM