fix: update sidebar-zindex #2673

Job	Run time
get-cypress-tests	5s
cypress-run (cypress/e2e/admin/topics.cy.ts)	6m 32s
cypress-run (cypress/e2e/admin/signin.cy.ts)	7m 13s
cypress-run (cypress/e2e/addContent/addTweet.cy.ts)	7m 10s
cypress-run (cypress/e2e/addContent/addWebpage.cy.ts)	7m 23s
cypress-run (cypress/e2e/addContent/addSource.cy.ts)	6m 22s
cypress-run (cypress/e2e/addContent/addYoutube.cy.ts)	7m 20s
cypress-run (cypress/e2e/addNode/addNodeType.cy.ts)	8m 31s
cypress-run (cypress/e2e/sourcesTable/sourcesTable.cy.ts)	6m 33s
cypress-run (cypress/e2e/createGeneratedEdges/createGeneratedEdges.cy.ts)	6m 41s
cypress-run (cypress/e2e/trendingTopics/trendingTopics.cy.ts)	7m 58s
cypress-run (cypress/e2e/checkEnv.cy.ts)	6m 49s
cypress-run (cypress/e2e/curationTable/curation.cy.ts)	6m 37s
cypress-run (cypress/e2e/seeLatest/latest.cy.ts)	8m 28s
	1h 33m 42s

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