Documentation: Correct some typos found in kernel markdown files

Author: https://github.com/afsong 🔰
Commit: https://github.com/SerenityOS/serenity/commit/cbdb5f926c
Pull-request: https://github.com/SerenityOS/serenity/pull/18652
Reviewed-by: https://github.com/AtkinsSJ ✅

Documentation/Kernel/DevelopmentGuidelines.md

@@ -32,7 +32,7 @@ so the userland program could know about the situation and act accordingly.
 
 An exception to this is when there's simply no way to propagate the error code to the userland program.
 Maybe it's a `ATAPort` (in the IDE ATA code) that asynchronously tries to handle reading data from the harddrive,
-but because of the async operation, we can't send the `errno` code back to userland, so we what we do is
+but because of the async operation, we can't send the `errno` code back to userland, so what we do is
 to ensure that internal functions still use the `ErrorOr<>` return type, and in main calling function, we use
 other meaningful infrastructure utilities in the Kernel to indicate that the operation failed.
 

Documentation/Kernel/GraphicsSubsystem.md

@@ -19,7 +19,7 @@ from the framebuffer.
 # DisplayConnector Devices
 
 The Display Connector devices are an abstraction layer to what is essentially the
-management layer of hardware display (commonly known as scanouts too) output connectors.
+management layer of hardware display (commonly known as scanouts) output connectors.
 The idea of using such type of device was inspired by Linux, which has a struct called
 `drm_connector` as a base structure for other derived structures in the various Linux DRM drivers.
 

Documentation/Kernel/ProcFSIndexing.md

@@ -7,7 +7,7 @@ each `InodeIndex` actually represent a known object, so it is guaranteed to be
 the same always for global ProcFS objects. For process ID directories, once that
 process has been killed, its primary segment value is no longer valid and hence
 all sub-segments of it are not relevant anymore, but if the process is still alive,
-it is guaranteed that accessing the same `InodeIndex` in regard to a object tied to
+it is guaranteed that accessing the same `InodeIndex` in regard to an object tied to
 a process directory will provide the expected object.
 
 ## The goal - zero allocations when creating new process

Documentation/Kernel/RAMFS.md

@@ -20,7 +20,7 @@ with very small overhead until actual IO is performed.
 Currently, the `/tmp` directory is the **place** for facilitating the inter-process
 communication layer, with many Unix sockets nodes being present in the directory.
 
-Many test suites in the project leverage the `/tmp` for placing their test files
+Many test suites in the project leverage `/tmp` for placing their test files
 when trying to check the correctness of many system-related functionality.
 Other programs rely on `/tmp` for placing their temporary files to properly function.