Cosmetic fixes to the navigation at the bottom of the README for tutorial 21 and 22.

arobenko · arobenko · commit a9bb76f4d7fb · 2022-08-12T17:49:27.000+10:00
diff --git a/tutorials/tutorial21/README.md b/tutorials/tutorial21/README.md
@@ -143,4 +143,4 @@ a temporary buffer (because their inner `ValueType` types are NOT convertible).
   `static_cast` when field's inner `ValueType` types are convertible and uses temporary buffer
   with write / read operations when such conversion is not possible.
 
-[Read Previous Tutorial](../tutorial20) &lt;----------------------- [Read Next Tutorial](../tutorial22) 
+[Read Previous Tutorial](../tutorial20) &lt;-----------------------&gt; [Read Next Tutorial](../tutorial22) 
diff --git a/tutorials/tutorial22/README.md b/tutorials/tutorial22/README.md
@@ -112,4 +112,4 @@ is used, while for the second one the **long** form is in place.
   static constexpr function, which provides maximal remaining length value.
 
 
-[Read Previous Tutorial](../tutorial21) &lt;----------------------- [Read Next Tutorial](../tutorial23) 
+[Read Previous Tutorial](../tutorial21) &lt;-----------------------&gt; [Read Next Tutorial](../tutorial23) 

Original file line number	Diff line number	Diff line change
`@@ -112,4 +112,4 @@ is used, while for the second one the long form is in place.`
`112`	`112`	`static constexpr function, which provides maximal remaining length value.`
`113`	`113`
`114`	`114`
`115`		`-[Read Previous Tutorial](../tutorial21) <----------------------- [Read Next Tutorial](../tutorial23)`
	`115`	`+[Read Previous Tutorial](../tutorial21) <-----------------------> [Read Next Tutorial](../tutorial23)`