fix: rename some references to .txt files to .md

Author: gamemaker1

.fpm

@@ -7,4 +7,4 @@
 --url "https://github.com/gamemaker1/bak"
 --maintainer "Vedant K (gamemaker1) <gamemaker0042 at gmail dot com>"
 
-source/bak=/usr/bin/bak man/bak.1=/usr/share/man/man1/bak.1 license.txt=/usr/share/licenses/bak/LICENSE
+source/bak=/usr/bin/bak man/bak.1=/usr/share/man/man1/bak.1 license.md=/usr/share/licenses/bak/LICENSE

scripts/bump-ver

@@ -20,7 +20,7 @@ then
 	exit 1
 fi
 
-# Replace all occurrences of the old version with the new one (except in changelog.txt)
+# Replace all occurrences of the old version with the new one (except in changelog.md)
 sed -i "s/$old_version/$new_version/g" man/bak.1
 sed -i "s/$old_version/$new_version/g" source/bak
 sed -i "s/$old_version/$new_version/g" readme.md

scripts/dist

@@ -28,14 +28,14 @@ fpm \
 	-t deb \
 	-p dist/bak-$(cat version)-1-any.deb \
 	--version $(cat version) \
-	--deb-changelog changelog.txt
+	--deb-changelog changelog.md
 
 # RedHat
 fpm \
 	-t rpm \
 	-p dist/bak-$(cat version)-1-any.rpm \
 	--version $(cat version) \
-	--rpm-changelog changelog.txt
+	--rpm-changelog changelog.md
 
 # Arch Linux
 fpm \
@@ -68,4 +68,4 @@ fpm \
 	--version $(cat version)
 
 # Generic
-tar -czf dist/bak-$(cat version)-1-any.tar.gz man source changelog.txt license.txt readme.txt version
+tar -czf dist/bak-$(cat version)-1-any.tar.gz man source changelog.md license.md readme.md version