chore(ci): Remove CI concurrency group & small fixes (#1758)

## Description

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about the "what" this PR is solving -->

It has no effect. The actions are run in parallel anyway. They have been
previously updated to not fail when run in parallel.

## Linked Issues

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## Additional Context

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nix/common.nix

@@ -1,8 +1,10 @@
 {
   lib,
   stdenvNoCC,
+  fetchPnpmDeps,
 
-  pnpm,
+  pnpm_10,
+  pnpmConfigHook,
 
   cacert,
   gitMinimal,
@@ -24,9 +26,9 @@ stdenvNoCC.mkDerivation (final: {
       !isEditorMetadataDirectory;
   };
 
-  pnpmDeps = pnpm.fetchDeps {
+  pnpmDeps = fetchPnpmDeps {
     inherit (final) pname version src;
-    fetcherVersion = 2;
+    fetcherVersion = 3;
     hash = builtins.readFile ./pnpm-deps-hash.txt;
   };
 
@@ -39,7 +41,8 @@ stdenvNoCC.mkDerivation (final: {
       cacert # For network request
       gitMinimal # For unplugin-info
       nodejs
-      pnpm.configHook
+      pnpm_10
+      pnpmConfigHook
     ];
 
     buildPhase = ''

nix/package.nix

@@ -6,7 +6,8 @@
   makeDesktopItem,
   makeWrapper,
   gitMinimal,
-  pnpm,
+  pnpm_10,
+  pnpmConfigHook,
 
   asar,
   electron,
@@ -20,7 +21,8 @@
     makeWrapper
     gitMinimal
     nodejs
-    pnpm.configHook
+    pnpm_10
+    pnpmConfigHook
   ];
 
   desktopItems = [