docs: update doc links from latest to stable

docs/strategy-callbacks.md

@@ -225,7 +225,7 @@ class AwesomeStrategy(IStrategy):
         e.g. returning -0.05 would create a stoploss 5% below current_rate.
         The custom stoploss can never be below self.stoploss, which serves as a hard maximum loss.
 
-        For full documentation please go to https://www.freqtrade.io/en/latest/strategy-advanced/
+        For full documentation please go to https://www.freqtrade.io/en/stable/strategy-advanced/
 
         When not implemented by a strategy, returns the initial stoploss value.
         Only called when use_custom_stoploss is set to True.
@@ -805,7 +805,7 @@ class AwesomeStrategy(IStrategy):
         Timing for this function is critical, so avoid doing heavy computations or
         network requests in this method.
 
-        For full documentation please go to https://www.freqtrade.io/en/latest/strategy-advanced/
+        For full documentation please go to https://www.freqtrade.io/en/stable/strategy-advanced/
 
         When not implemented by a strategy, returns True (always confirming).
 
@@ -853,7 +853,7 @@ class AwesomeStrategy(IStrategy):
         Timing for this function is critical, so avoid doing heavy computations or
         network requests in this method.
 
-        For full documentation please go to https://www.freqtrade.io/en/latest/strategy-advanced/
+        For full documentation please go to https://www.freqtrade.io/en/stable/strategy-advanced/
 
         When not implemented by a strategy, returns True (always confirming).
 
@@ -991,7 +991,7 @@ class DigDeeperStrategy(IStrategy):
         This means extra entry or exit orders with additional fees.
         Only called when `position_adjustment_enable` is set to True.
 
-        For full documentation please go to https://www.freqtrade.io/en/latest/strategy-advanced/
+        For full documentation please go to https://www.freqtrade.io/en/stable/strategy-advanced/
 
         When not implemented by a strategy, returns None
 
@@ -1118,7 +1118,7 @@ class AwesomeStrategy(IStrategy):
         This only executes when a order was already placed, still open (unfilled fully or partially)
         and not timed out on subsequent candles after entry trigger.
 
-        For full documentation please go to https://www.freqtrade.io/en/latest/strategy-callbacks/
+        For full documentation please go to https://www.freqtrade.io/en/stable/strategy-callbacks/
 
         When not implemented by a strategy, returns current_order_rate as default.
         If current_order_rate is returned then the existing order is maintained.