apptainer, singularity: fix the update instructions in the comment (#359528)

pkgs/applications/virtualization/singularity/generic.nix

@@ -14,8 +14,9 @@
 }:
 
 let
-  # Workaround for vendor-related attributes not overridable (#86349)
-  # should be removed when the issue is resolved
+  # Backward compatibility layer for the obsolete workaround of
+  # the "vendor-related attributes not overridable" issue (#86349),
+  # whose solution is merged and released.
   _defaultGoVendorArgs = {
     inherit vendorHash deleteVendor proxyVendor;
   };

pkgs/applications/virtualization/singularity/packages.nix

@@ -19,9 +19,8 @@ let
           hash = "sha256-ZdSo9bKZ7Q1xwMe4SR840U3+fVpKwtiZQA5KDM5qF9M=";
         };
 
-        # Update by running
-        # nix-prefetch -E "{ sha256 }: ((import ./. { }).apptainer.override { vendorHash = sha256; }).goModules"
-        # at the root directory of the Nixpkgs repository
+        # Override vendorHash with overrideAttrs.
+        # See https://nixos.org/manual/nixpkgs/unstable/#buildGoModule-vendorHash
         vendorHash = "sha256-W853++SSvkAYYUczbl8vnoBQZnimUdsAEXp4MCkLPBU=";
 
         extraDescription = " (previously known as Singularity)";
@@ -57,9 +56,8 @@ let
           hash = "sha256-Go4um/bIgq2lCZvjJ2GR81XpA/JvjPholi1PzNG9Hz8=";
         };
 
-        # Update by running
-        # nix-prefetch -E "{ sha256 }: ((import ./. { }).singularity.override { vendorHash = sha256; }).goModules"
-        # at the root directory of the Nixpkgs repository
+        # Override vendorHash with overrideAttrs.
+        # See https://nixos.org/manual/nixpkgs/unstable/#buildGoModule-vendorHash
         vendorHash = "sha256-CRZ42NdmJhAkV6bkl5n7rEV4Tu/h65qF5qaQ4W5wQ3w=";
 
         # Do not build conmon and squashfuse from the Git submodule sources,