nvim: lsp: lemminx: fix cache dir

.config/nvim/lua/my/lsp.lua

@@ -153,6 +153,13 @@ if vim.fn.executable('lemminx') > 0 then
         filetypes = {
             'xml', 'xsd', 'xsl', 'xslt', 'svg', 'gentoo-metadata'
         },
+        settings = {
+            xml = {
+                server = { -- path for cached XML Schemas
+                    workDir = vim.fn.stdpath('cache') .. '/lemminx'
+                }
+            }
+        },
         on_attach = on_attach,
         capabilities = capabilities
     })