chore(deps): Add integrity for the xlsx tarball (#7835)

We are building nocodb using pnpm2nix-nzbr [1], and that library
requires all dependencies to have integrities.

And it's more secure anyway, since if someone hijacks that website
and replaces that tarball with something malicious, pnpm will refuse
to use that.

[1]: https://github.com/nzbr/pnpm2nix-nzbr

pnpm-lock.yaml

@@ -27502,7 +27502,7 @@ packages:
     dev: true
 
   '@cdn.sheetjs.com/xlsx-0.19.3/xlsx-0.19.3.tgz':
-    resolution: {tarball: https://cdn.sheetjs.com/xlsx-0.19.3/xlsx-0.19.3.tgz}
+    resolution: {integrity: sha512-8IfgFctB7fkvqkTGF2MnrDrC6vzE28Wcc1aSbdDQ+4/WFtzfS73YuapbuaPZwGqpR2e0EeDMIrFOJubQVLWFNA==, tarball: https://cdn.sheetjs.com/xlsx-0.19.3/xlsx-0.19.3.tgz}
     name: xlsx
     version: 0.19.3
     engines: {node: '>=0.8'}