swtpm: Update printed copyright notice

Signed-off-by: Stefan Berger <stefanb@linux.ibm.com>
diff --git a/src/swtpm/main.c b/src/swtpm/main.c
index 14cbaf6..4864e85 100644
--- a/src/swtpm/main.c
+++ b/src/swtpm/main.c
@@ -84,7 +84,7 @@
         usage(stdout, argv[0]);
     } else if (!strcmp(argv[1], "-v") || !strcmp(argv[1], "--version")) {
         fprintf(stdout, "TPM emulator version %d.%d.%d, "
-                "Copyright (c) 2014-2021 IBM Corp.\n",
+                "Copyright (c) 2014-2022 IBM Corp. and others\n",
                 SWTPM_VER_MAJOR,
                 SWTPM_VER_MINOR,
                 SWTPM_VER_MICRO);