Remove esm.sh from CSP since it is no longer used

src/main/webapp/Portal.html

@@ -10,7 +10,7 @@
 
     <meta
       http-equiv="Content-Security-Policy"
-      content="default-src 'self' data: blob: 'unsafe-inline' 'unsafe-eval' *.synapse.org *.sagebase.org *.googleapis.com *.gstatic.com *.googletagmanager.com cdn.statuspage.io s3.amazonaws.com www.google-analytics.com kh896k90gyvg.statuspage.io *.youtube.com *.rstudio.com *.google.com *.shinyapps.io *.smartsheet.com sagebionetworks.jira.com 127.0.0.1:9876 esm.sh localhost:5173; frame-ancestors 'self' https://*.synapse.org localhost; img-src * data: blob:; connect-src https://* http://127.0.0.1:8888 http://localhost:5173 ws://localhost:5173"
+      content="default-src 'self' data: blob: 'unsafe-inline' 'unsafe-eval' *.synapse.org *.sagebase.org *.googleapis.com *.gstatic.com *.googletagmanager.com cdn.statuspage.io s3.amazonaws.com www.google-analytics.com kh896k90gyvg.statuspage.io *.youtube.com *.rstudio.com *.google.com *.shinyapps.io *.smartsheet.com sagebionetworks.jira.com 127.0.0.1:9876 localhost:5173; frame-ancestors 'self' https://*.synapse.org localhost; img-src * data: blob:; connect-src https://* http://127.0.0.1:8888 http://localhost:5173 ws://localhost:5173"
     />
     <meta
       name="google-site-verification"