doc: minor improvements to buffer.md

PR-URL: #19547
Reviewed-By: Richard Lau <[email protected]>
Reviewed-By: Michaël Zasso <[email protected]>
Reviewed-By: Tobias Nießen <[email protected]>
Reviewed-By: Luigi Pinca <[email protected]>
Reviewed-By: Сковорода Никита Андреевич <[email protected]>
Reviewed-By: Vse Mozhet Byt <[email protected]>
Reviewed-By: Colin Ihrig <[email protected]>
Reviewed-By: Trivikram Kamat <[email protected]>

Author: Trott

doc/api/buffer.md

@@ -15,9 +15,9 @@ With [`TypedArray`] now available, the `Buffer` class implements the
 Instances of the `Buffer` class are similar to arrays of integers but
 correspond to fixed-sized, raw memory allocations outside the V8 heap.
 The size of the `Buffer` is established when it is created and cannot be
-resized.
+changed.
 
-The `Buffer` class is a global within Node.js, making it unlikely that one
+The `Buffer` class is within the global scope, making it unlikely that one
 would need to ever use `require('buffer').Buffer`.
 
 Examples: