feat: change clang icons to llvm dragon logo (#654)

Co-authored-by: Alexander Courtis <alex@courtis.org>

Author: Pistonight

lua/nvim-web-devicons/default/icons_by_filename.lua

@@ -5,9 +5,9 @@ return {
   [".babelrc"]                   = { icon = "", color = "#CBCB41", cterm_color = "185", name = "Babelrc"                  },
   [".bash_profile"]              = { icon = "", color = "#89E051", cterm_color = "113", name = "BashProfile"              },
   [".bashrc"]                    = { icon = "", color = "#89E051", cterm_color = "113", name = "Bashrc"                   },
-  [".clang-format"]              = { icon = "", color = "#6D8086", cterm_color = "66",  name = "ClangConfig"              },
-  [".clang-tidy"]                = { icon = "", color = "#6D8086", cterm_color = "66",  name = "ClangConfig"              },
-  [".clangd"]                    = { icon = "", color = "#6D8086", cterm_color = "66",  name = "ClangConfig"              },
+  [".clang-format"]              = { icon = "", color = "#97C3E6", cterm_color = "153", name = "ClangConfig"              },
+  [".clang-tidy"]                = { icon = "", color = "#97C3E6", cterm_color = "153", name = "ClangConfig"              },
+  [".clangd"]                    = { icon = "", color = "#97C3E6", cterm_color = "153", name = "ClangConfig"              },
   [".codespellrc"]               = { icon = "󰓆", color = "#35DA60", cterm_color = "41",  name = "Codespell"                },
   [".condarc"]                   = { icon = "", color = "#43B02A", cterm_color = "34",  name = "Conda"                    },
   [".dockerignore"]              = { icon = "󰡨", color = "#458EE6", cterm_color = "68",  name = "Dockerfile"               },