Release v1.20.5-dev

Changes since v1.20.1-dev:
- fix: Inject version into core.hpp during release process and update git add command
- fix: Update version string to v1.20.1-dev and enhance packaging of firmware binaries

Author: Friedjof

VERSION

@@ -1 +1 @@
-// v1.20.1-dev
+// v1.20.5-dev

src/core/core.hpp

@@ -67,5 +67,5 @@ void reverseByteArray(unsigned char *data, int len);
 // major = 0..15, minor = 0..255, patch = 0..15.
 //
 // vvv--- do not edit here, this is managed by bump2version! ---vvv
-#define VERSION_STR "v1.20.1-dev"
+#define VERSION_STR "v1.20.5-dev"
 // ^^^--- do not edit here, this is managed by bump2version! ---^^^