fix(doc): correct description of sha256() and warn users of potenti…

…al issues

docs/src/content/docs/book/operators.mdx

@@ -100,8 +100,8 @@ Unary here means that they are applied only to one operand of the given expressi
 
 Unary operators can be one of the two types:
 
-* prefix — placed before the expression.
-* postfix (or suffix) —  placed after the expression.
+* Prefix — placed before the expression.
+* Postfix (or suffix) — placed after the expression.
 
 ### Non-null assert, `!!` {#unary-non-null-assert}
 

docs/src/content/docs/ref/core-math.mdx

@@ -256,11 +256,15 @@ fun sha256(data: Slice): Int;
 fun sha256(data: String): Int;
 ```
 
-Computes and returns the [SHA-256][sha-2] hash as an $256$-bit unsigned [`Int{:tact}`][int] from a passed [`Slice{:tact}`][slice] or [`String{:tact}`][p] `data`.
+Computes and returns the [SHA-256][sha-2] hash as a $256$-bit unsigned [`Int{:tact}`][int] from a passed [`Slice{:tact}`][slice] or [`String{:tact}`][p] `data`.
 
-In case `data` is a [`String{:tact}`][p] it should have a number of bits divisible by $8$, and in case it's a [`Slice{:tact}`][slice] it must **also** have no references (i.e. only up to 1023 bits of data in total).
+In case `data` is a [`String{:tact}`][p] it should have a number of bits divisible by $8$, and in case it's a [`Slice{:tact}`][slice] it must **also** have no references (i.e. only up to $1023$ bits of data in total). This function tries to resolve constant string values in [compile-time](/ref/core-comptime) whenever possible.
 
-This function tries to resolve constant string values in [compile-time](/ref/core-comptime) whenever possible.
+:::caution
+
+  If there are more than $128$ bytes in the provided [`String{:tact}`][p] or [`Slice{:tact}`][slice], a compilation error is raised if the compiler can track it, and if not — the hashes of such long arguments would be the same on TON, which might cause collisions. Prefer to hash smaller arguments to prevent such cases.
+
+:::
 
 Usage examples:
 

docs/src/content/docs/ref/stdlib-dns.mdx

@@ -41,7 +41,7 @@ Source code (FunC): [dns.fc#L1](https://github.com/tact-lang/tact/blob/e69c7fc99
 native dnsInternalNormalize(src: Slice): Slice;
 ```
 
-Normalizes the internal DNS representation of the [`Slice{:tact}`][slice]. The passed [`Slice{:tact}`][slice] must not have any references, otherwise an exception wit [exit code 134](/book/exit-codes#134) will be thrown: `Invalid argument`.
+Normalizes the internal DNS representation of the [`Slice{:tact}`][slice]. The passed [`Slice{:tact}`][slice] must not have any references, otherwise an exception with [exit code 134](/book/exit-codes#134) will be thrown: `Invalid argument`.
 
 Source code (FunC): [dns.fc#L125](https://github.com/tact-lang/tact/blob/e69c7fc99dc9be3fa5ff984456c03ffe8fed3677/stdlib/libs/dns.fc#L125)