imx-gst1.0-plugin: correct pv

The update of imx-gst1.0-plugin for the 5.4.3_2.1.0 BSP version bumped
the version of the plugins to 4.5.5. Follow that in PV.

https://source.codeaurora.org/external/imx/imx-gst1.0-plugin/tree/configure.ac?h=MM_04.05.05_2005_L5.4.24&id=4d2e5c1547c5f8a5e4e26a034ab87c809b34fb54

Signed-off-by: Max Krummenacher <max.krummenacher@toradex.com>

diff --git a/recipes-multimedia/gstreamer/imx-gst1.0-plugin_4.5.3.bb b/recipes-multimedia/gstreamer/imx-gst1.0-plugin_4.5.5.bb
similarity index 100%
rename from recipes-multimedia/gstreamer/imx-gst1.0-plugin_4.5.3.bb
rename to recipes-multimedia/gstreamer/imx-gst1.0-plugin_4.5.5.bb