fix(nsis): use runtime ${If} check to clean up deep link on uninstall (#10103)

Author: Legend-Master

.changes/nsis-deep-link-uninstall.md

@@ -0,0 +1,5 @@
+---
+"tauri-bundler": "patch:bug"
+---
+
+Fix NSIS uninstaller failing to clean up deep links

tooling/bundler/src/bundle/windows/templates/installer.nsi

@@ -679,9 +679,9 @@ Section Uninstall
   ; Delete deep links
   {{#each deep_link_protocols as |protocol| ~}}
     ReadRegStr $R7 SHCTX "Software\Classes\\{{protocol}}\shell\open\command" ""
-    !if $R7 == "$\"$INSTDIR\${MAINBINARYNAME}.exe$\" $\"%1$\""
+    ${If} $R7 == "$\"$INSTDIR\${MAINBINARYNAME}.exe$\" $\"%1$\""
       DeleteRegKey SHCTX "Software\Classes\\{{protocol}}"
-    !endif
+    ${EndIf}
   {{/each}}