YARN-11563. Fix word misspellings from CSAssignemnt to CSAssignment

[granewang]

misspellings of CSAssignemnt which shoud be CSAssignment

[hadoop-yetus]

💔 -1 overall

Vote	Subsystem	Runtime	Logfile	Comment
+0 🆗	reexec	0m 29s		Docker mode activated.
			_ Prechecks _
+1 💚	dupname	0m 0s		No case conflicting files found.
+0 🆗	codespell	0m 1s		codespell was not available.
+0 🆗	detsecrets	0m 1s		detect-secrets was not available.
+1 💚	@author	0m 0s		The patch does not contain any @author tags.
-1 ❌	test4tests	0m 0s		The patch doesn't appear to include any new or modified tests. Please justify why no new tests are needed for this patch. Also please list what manual steps were performed to verify this patch.
			_ trunk Compile Tests _
+1 💚	mvninstall	31m 43s		trunk passed
+1 💚	compile	0m 44s		trunk passed with JDK Ubuntu-11.0.20.1+1-post-Ubuntu-0ubuntu120.04
+1 💚	compile	0m 40s		trunk passed with JDK Private Build-1.8.0_382-8u382-ga-1~20.04.1-b05
+1 💚	checkstyle	0m 37s		trunk passed
+1 💚	mvnsite	0m 41s		trunk passed
+1 💚	javadoc	0m 44s		trunk passed with JDK Ubuntu-11.0.20.1+1-post-Ubuntu-0ubuntu120.04
+1 💚	javadoc	0m 37s		trunk passed with JDK Private Build-1.8.0_382-8u382-ga-1~20.04.1-b05
+1 💚	spotbugs	1m 20s		trunk passed
+1 💚	shadedclient	21m 38s		branch has no errors when building and testing our client artifacts.
			_ Patch Compile Tests _
+1 💚	mvninstall	0m 34s		the patch passed
+1 💚	compile	0m 37s		the patch passed with JDK Ubuntu-11.0.20.1+1-post-Ubuntu-0ubuntu120.04
+1 💚	javac	0m 37s		the patch passed
+1 💚	compile	0m 33s		the patch passed with JDK Private Build-1.8.0_382-8u382-ga-1~20.04.1-b05
+1 💚	javac	0m 33s		the patch passed
+1 💚	blanks	0m 0s		The patch has no blanks issues.
+1 💚	checkstyle	0m 28s		the patch passed
+1 💚	mvnsite	0m 33s		the patch passed
+1 💚	javadoc	0m 31s		the patch passed with JDK Ubuntu-11.0.20.1+1-post-Ubuntu-0ubuntu120.04
+1 💚	javadoc	0m 30s		the patch passed with JDK Private Build-1.8.0_382-8u382-ga-1~20.04.1-b05
+1 💚	spotbugs	1m 15s		the patch passed
+1 💚	shadedclient	21m 19s		patch has no errors when building and testing our client artifacts.
			_ Other Tests _
+1 💚	unit	85m 54s		hadoop-yarn-server-resourcemanager in the patch passed.
+1 💚	asflicense	0m 29s		The patch does not generate ASF License warnings.
		174m 16s

Subsystem	Report/Notes
Docker	ClientAPI=1.43 ServerAPI=1.43 base: https://ci-hadoop.apache.org/job/hadoop-multibranch/job/PR-6026/1/artifact/out/Dockerfile
GITHUB PR	#6026
Optional Tests	dupname asflicense compile javac javadoc mvninstall mvnsite unit shadedclient spotbugs checkstyle codespell detsecrets
uname	Linux d1e27c395f25 4.15.0-212-generic #223-Ubuntu SMP Tue May 23 13:09:22 UTC 2023 x86_64 x86_64 x86_64 GNU/Linux
Build tool	maven
Personality	dev-support/bin/hadoop.sh
git revision	trunk / 55104e0
Default Java	Private Build-1.8.0_382-8u382-ga-1~20.04.1-b05
Multi-JDK versions	/usr/lib/jvm/java-11-openjdk-amd64:Ubuntu-11.0.20.1+1-post-Ubuntu-0ubuntu120.04 /usr/lib/jvm/java-8-openjdk-amd64:Private Build-1.8.0_382-8u382-ga-1~20.04.1-b05
Test Results	https://ci-hadoop.apache.org/job/hadoop-multibranch/job/PR-6026/1/testReport/
Max. process+thread count	963 (vs. ulimit of 5500)
modules	C: hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-resourcemanager U: hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-resourcemanager
Console output	https://ci-hadoop.apache.org/job/hadoop-multibranch/job/PR-6026/1/console
versions	git=2.25.1 maven=3.6.3 spotbugs=4.2.2
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[granewang]

UT is not need ，just misspellings

[ayushtkn]

LGTM