minor: fixed P tag content's placement in CauseParameterInExceptionCheck.java

[Zopsss]

part of: checkstyle/checkstyle#15686

detected at: https://checkstyle.semaphoreci.com/jobs/46bc3abc-9190-43d9-bb99-3a25a47a386b#L757

[romani]

CI failure is:
Error: Failed to execute goal org.apache.maven.plugins:maven-site-plugin:3.3:site (default-site) on project sample: Error during page generation: Error rendering Maven report: Failed during checkstyle configuration: Exception was thrown while processing /home/runner/work/sevntu.checkstyle/sevntu.checkstyle/sevntu-checks/.ci-temp/contribution/checkstyle-tester/src/main/java/checkstyle/src/test/resources-noncompilable/com/puppycrawl/tools/checkstyle/grammar/java21/InputUnnamedVariableSwitch.java: IllegalStateException occurred while parsing file /home/runner/work/sevntu.checkstyle/sevntu.checkstyle/sevntu-checks/.ci-temp/contribution/checkstyle-tester/src/main/java/checkstyle/src/test/resources-noncompilable/com/puppycrawl/tools/checkstyle/grammar/java21/InputUnnamedVariableSwitch.java. 21:26: mismatched input ',' expecting '->': InputMismatchException -> [Help 1]