fix: Update gdb.json

It is not recommended to use dotfiles in $XDG_CONFIG_HOME.

programs/gdb.json

@@ -9,7 +9,7 @@
         {
             "path": "$HOME/.gdb_history",
             "movable": true,
-            "help": "GDB supports setting it's config file path through an environment variable. Simply move your _.gdb_history_ file to _$XDG_CONFIG_HOME/gdb_ and export the following:\n\n```bash\nexport GDBHISTFILE=\"$XDG_CONFIG_HOME\"/gdb/.gdb_history \n```\n\nNote: If you are using GEF this does not work, as GEF overwrites the filepath. In order to use the correct path again, you have to call ```set history filename ~/.config/gdb/.gdb_history``` after you source _gef.py_ in your gdb init file.\n"
+            "help": "GDB supports setting it's config file path through an environment variable. Simply move your _.gdb_history_ file to _$XDG_CONFIG_HOME/gdb_ and export the following:\n\n```bash\nexport GDBHISTFILE=\"$XDG_CONFIG_HOME\"/gdb/gdb_history \n```\n\nNote: If you are using GEF this does not work, as GEF overwrites the filepath. In order to use the correct path again, you have to call ```set history filename ~/.config/gdb/gdb_history``` after you source _gef.py_ in your gdb init file.\n"
         }
     ]
 }