fix typos

Author: Techatrix

content/zls/guides/build-on-save.smd

@@ -11,7 +11,7 @@ ZLS can be configured to run your build script on save. If that results in build
 
 ## Configuration
 
-By default, ZLS will automatically enable Build-On-Save if your build script defines a "check" step. Otherwise you will need set the `enable_build_on_save` config option.
+By default, ZLS will automatically enable Build-On-Save if your build script defines a "check" step. Otherwise you will need to set the `enable_build_on_save` config option.
 You can use `build_on_save_args` to configure which command-line arguments should be passed to your build script.
 
 Here is an example:

content/zls/install.smd

@@ -12,7 +12,7 @@
 
 []($section.id('vscode-banner'))
 
-**VS Code** users only needs the [official Zig Language extension](https://marketplace.visualstudio.com/items?itemName=ziglang.vscode-zig).
+**VS Code** users only need the [official Zig Language extension](https://marketplace.visualstudio.com/items?itemName=ziglang.vscode-zig).
 
 *No need to manually install Zig or ZLS.*