build: Fix Gentoo ebuild (#1787)

### Problem description
Ebuild is invalid, i.e:
```
# ebuild ImHex-9999.ebuild manifest
Error(s) in metadata for 'app-editors/ImHex-9999':
  RDEPEND: Invalid atom (dbus), token 5
```

### Implementation description
* mbedtls is in net-libs category
* RDEPEND must contain atoms (category/packagename)

Signed-off-by: Sébastien Szymanski <sebastien.szymanski@armadeus.com>
Co-authored-by: Nik <werwolv98@gmail.com>

dist/ImHex-9999.ebuild

@@ -20,13 +20,13 @@ DEPEND=""
 RDEPEND="${DEPEND}
 		media-libs/glfw
 		sys-apps/file
-		dev-libs/mbedtls
+		net-libs/mbedtls
 		dev-cpp/nlohmann_json
-		dbus
-		xdg-desktop-portal
+		sys-apps/dbus
+		sys-apps/xdg-desktop-portal
 		sys-libs/zlib
-        app-arch/bzip2
-        app-arch/lzma
-        app-arch/zstd
+		app-arch/bzip2
+		app-arch/lzma
+		app-arch/zstd
 		"
 BDEPEND="${DEPEND}"