Update readme to include guidance on version ranges for dependencies (microsoft#3754)

Author: wmmc88

crates/libs/sys/readme.md

@@ -11,14 +11,16 @@ Start by adding the following to your Cargo.toml file:
 
 ```toml
 [dependencies.windows-sys]
-version = "0.61"
+version = ">=0.59, <=0.61"
 features = [
     "Win32_Security",
     "Win32_System_Threading",
     "Win32_UI_WindowsAndMessaging",
 ]
 ```
 
+Using a range instead of the [default Caret requirements](https://doc.rust-lang.org/cargo/reference/specifying-dependencies.html#caret-requirements) helps avoid duplicate versions in downstream graphs and improves resolver flexibility.
+
 Make use of any Windows APIs as needed:
 
 ```rust,no_run
@@ -36,3 +38,5 @@ unsafe {
     MessageBoxW(0 as _, w!("Wide"), w!("Caption"), MB_OK);
 }
 ```
+
+ 

crates/libs/windows/readme.md

@@ -11,7 +11,7 @@ Start by adding the following to your Cargo.toml file:
 
 ```toml
 [dependencies.windows]
-version = "0.62"
+version = ">=0.59, <=0.62"
 features = [
     "Data_Xml_Dom",
     "Win32_Security",
@@ -20,6 +20,8 @@ features = [
 ]
 ```
 
+Using a range instead of the [default Caret requirements](https://doc.rust-lang.org/cargo/reference/specifying-dependencies.html#caret-requirements) helps avoid duplicate versions in downstream graphs and improves resolver flexibility.
+
 Make use of any Windows APIs as needed:
 
 ```rust,no_run