fix: anchor

Author: zamulla

docs/topics/jvm/comparison-to-java.md

@@ -45,7 +45,7 @@ Kotlin fixes a series of issues that Java suffers from:
 * [Data classes](data-classes.md)
 * [Coroutines](coroutines-overview.md)
 * [Top-level functions](functions.md)
-* [Parameters with default values](functions.md#parameters-with-default-values)
+* [Parameters with default values](functions.md#parameters-with-default-values-optional-parameters)
 * [Named parameters](functions.md#named-arguments)
 * [Infix functions](functions.md#infix-notation)
 * [Expect and actual declarations](https://kotlinlang.org/docs/multiplatform/multiplatform-expect-actual.html)

docs/topics/jvm/java-to-kotlin-nullability-guide.md

@@ -218,7 +218,7 @@ findOrder()?.customer?.let(::processCustomer)
 
 ## Default values instead of null
 
-Checking for `null` is often used in combination with [setting the default value](functions.md#parameters-with-default-values)
+Checking for `null` is often used in combination with [setting the default value](functions.md#parameters-with-default-values-optional-parameters)
 in case the null check is successful.
 
 The Java code with a null check:

docs/topics/keyword-reference.md

@@ -135,7 +135,7 @@ Kotlin supports the following operators and special symbols:
      - `*` is also used to [pass an array to a vararg parameter](functions.md#variable-number-of-arguments-varargs).
  * `=`
      - assignment operator.
-     - is used to specify [default values for parameters](functions.md#parameters-with-default-values).
+     - is used to specify [default values for parameters](functions.md#parameters-with-default-values-optional-parameters).
  * `+=`, `-=`, `*=`, `/=`, `%=` - [augmented assignment operators](operator-overloading.md#augmented-assignments).
  * `++`, `--` - [increment and decrement operators](operator-overloading.md#increments-and-decrements).
  * `&&`, `||`, `!` - logical 'and', 'or', 'not' operators (for bitwise operations, use the corresponding [infix functions](numbers.md#operations-on-numbers) instead).