vscode-extensions: use sri hashes in update script (#381560)

pkgs/applications/editors/vscode/extensions/update_installed_exts.sh

@@ -43,8 +43,8 @@ function get_vsixpkg() {
     curl --silent --show-error --retry 3 --fail -X GET -o "$EXTTMP/$N.zip" "$URL"
     # Unpack the file we need to stdout then pull out the version
     VER=$(jq -r '.version' <(unzip -qc "$EXTTMP/$N.zip" "extension/package.json"))
-    # Calculate the SHA
-    SHA=$(nix-hash --flat --base32 --type sha256 "$EXTTMP/$N.zip")
+    # Calculate the hash
+    HASH=$(nix-hash --flat --sri --type sha256 "$EXTTMP/$N.zip")
 
     # Clean up.
     rm -Rf "$EXTTMP"
@@ -55,7 +55,7 @@ function get_vsixpkg() {
     name = "$2";
     publisher = "$1";
     version = "$VER";
-    sha256 = "$SHA";
+    hash = "$HASH";
   }
 EOF
 }