Update: Developer credits (#9091)

CREDITS.md

@@ -14,7 +14,6 @@
 - Ingo von Borstel (planetmaker) - General coding, Support (since 1.1)
 - Remko Bijker (Rubidium) - Lead coder and way more (since 0.4.5)
 - José Soler (Terkhen) - General coding (since 1.0)
-- Leif Linse (Zuu) - AI/Game Script (since 1.2)
 
 ### Inactive Developers:
 
@@ -28,6 +27,7 @@
 - Christoph Mallon (Tron) - Programmer, code correctness police (0.3 - 0.5)
 - Patric Stout (TrueBrain) - NoProgrammer (0.3 - 1.2), sys op (active)
 - Thijs Marinussen (Yexo) - AI Framework, General (0.6 - 1.3)
+- Leif Linse (Zuu) - AI/Game Script (1.2 - 1.6)
 
 ### Retired Developers:
 

src/misc_gui.cpp

@@ -445,7 +445,6 @@ static const char * const _credits[] = {
 	u8"  Ingo von Borstel (planetmaker) - General, Support (since 1.1)",
 	u8"  Remko Bijker (Rubidium) - Lead coder and way more (since 0.4.5)",
 	u8"  Jos\u00e9 Soler (Terkhen) - General coding (since 1.0)",
-	u8"  Leif Linse (Zuu) - AI/Game Script (since 1.2)",
 	u8"",
 	u8"Inactive Developers:",
 	u8"  Jean-Fran\u00e7ois Claeys (Belugas) - GUI, NewGRF and more (0.4.5 - 1.0)",
@@ -458,6 +457,7 @@ static const char * const _credits[] = {
 	u8"  Christoph Mallon (Tron) - Programmer, code correctness police (0.3 - 0.5)",
 	u8"  Patric Stout (TrueBrain) - NoAI, NoGo, Network (0.3 - 1.2), sys op (active)",
 	u8"  Thijs Marinussen (Yexo) - AI Framework, General (0.6 - 1.3)",
+	u8"  Leif Linse (Zuu) - AI/Game Script (1.2 - 1.6)",
 	u8"",
 	u8"Retired Developers:",
 	u8"  Tam\u00e1s Farag\u00f3 (Darkvater) - Ex-Lead coder (0.3 - 0.5)",