package.json: adjust sass version pin

Use "^" instead of "~" to match dependabot's behavior, which bumps
minor and patch releases. This is also closer to the behavior of
sass-loader, which we use and also depends on sass.

Author: alanorth

package-lock.json

@@ -218,7 +218,7 @@
     "postcss-loader": "^4.0.3",
     "postcss-preset-env": "^7.4.2",
     "rimraf": "^6.1.2",
-    "sass": "~1.97.3",
+    "sass": "^1.97.3",
     "sass-loader": "^12.6.0",
     "sass-resources-loader": "^2.2.5",
     "ts-node": "^8.10.2",