Docs: adjust requirements for current version

Placeholder until resolution for LycheeOrg/Lychee#1164

docs/installation.md

@@ -9,21 +9,23 @@ The Lychee gallery has a few system requirements. You will need to make sure you
     - MySQL _(version > 5.7.8)_ / MariaDB _(version > 10.2)_
 	- PostgreSQL _(version > 9.2)_
 	- Lychee's inbuilt SQLite3 support
-- PHP >= 7.4 with these PHP extensions:
-    - BCMath
-    - Ctype
-    - Exif
-    - Ffmpeg (optional — to generate video thumbnails)
-    - Fileinfo
-    - GD
-    - Imagick (optional — to generate better thumbnails)
-    - JSON
-    - Mbstring
-    - OpenSSL
-    - PDO
-    - Tokenizer
-    - XML
-    - ZIP
+- Lychee 4.4.0 and earlier:
+	- PHP >= 8.0 with these PHP extensions:
+		- BCMath
+		- Ctype
+		- Exif
+		- Ffmpeg (optional — to generate video thumbnails)
+		- Fileinfo
+		- GD
+		- Imagick (optional — to generate better thumbnails)
+		- Intl
+		- JSON
+   		- Mbstring
+   		- OpenSSL
+   		- PDO
+   		- Tokenizer
+   		- XML
+   		- ZIP
 
 While Lychee works on 32bit systems, we **strongly** recommend the use of a 64bit OS.