Appstream: Use exact name match for application lookups.

Prefix matching is ok for addons, but some apps can be similar
enough to cause confused results.

Fixes linuxmint/mint22.1-beta#37.

usr/lib/python3/dist-packages/mintcommon/installer/appstream_pool.py

@@ -431,7 +431,7 @@ def lookup_appstream_package(self, pkginfo):
             try:
                 if kind == KIND_APP:
                     base_node = self.xmlb_silo.query_first(
-                        f"components/component/id[starts-with(text(),'{pkginfo.name}')]/.."
+                        f"components/component/id[text()='{pkginfo.name}']/.."
                     )
                 else:
                     base_nodes = self.xmlb_silo.query(