[skip ci] Updated licenses and gitignores

options/gitignore/Unity

@@ -1,6 +1,6 @@
 # This .gitignore file should be placed at the root of your Unity project directory
 #
-# Get latest from https://github.com/github/gitignore/blob/master/Unity.gitignore
+# Get latest from https://github.com/github/gitignore/blob/main/Unity.gitignore
 #
 /[Ll]ibrary/
 /[Tt]emp/
@@ -17,9 +17,6 @@
 # Recordings can get excessive in size
 /[Rr]ecordings/
 
-# Asset meta data should only be ignored when the corresponding asset is also ignored
-!/[Aa]ssets/**/*.meta
-
 # Uncomment this line if you wish to ignore the asset store tools plugin
 # /[Aa]ssets/AssetStoreTools*