Version rollout (#8764)

* Bump version and create initial changelog entry

* Update French.properties (#8761)

* Update Italian.properties (#8757)

* Added some bulgarian translations (#8756)

* Added some Bulgarian translations

* Removed unnecessary comments

When adding the translations, I forgot to remove some "# Requires translation!" comments

* Update Catalan.properties (#8754)

* Update Polish.properties (#8752)

* Update Polish.properties

* Update Polish.properties

* Update Brazilian_Portuguese.properties (#8750)

* Update Spanish.properties (#8749)

---------

Co-authored-by: yairm210 <yairm210@users.noreply.github.com>
Co-authored-by: Ouaz <Ouaz@users.noreply.github.com>
Co-authored-by: Giuseppe D'Addio <41149920+Smashfanful@users.noreply.github.com>
Co-authored-by: vynaaa <101423783+vynaaa@users.noreply.github.com>
Co-authored-by: Joan Josep <juanjo.ng.83@gmail.com>
Co-authored-by: Lesiakower <125187776+Lesiakower@users.noreply.github.com>
Co-authored-by: Vitor Gabriel <59321138+Ranbut@users.noreply.github.com>
Co-authored-by: Caballero Arepa <78449553+Caballero-Arepa@users.noreply.github.com>

core/src/com/unciv/UncivGame.kt

@@ -551,7 +551,7 @@ class UncivGame(parameters: UncivGameParameters) : Game() {
 
     companion object {
         //region AUTOMATICALLY GENERATED VERSION DATA - DO NOT CHANGE THIS REGION, INCLUDING THIS COMMENT
-        val VERSION = Version("4.5.0", 819)
+        val VERSION = Version("4.5.1", 823)
         //endregion
 
         lateinit var Current: UncivGame