build-unit-test-docker: fmtlib: update to 10.1.1

The 10.1.1 release is now used in yocto poky.

Signed-off-by: Patrick Williams <patrick@stwcx.xyz>
Change-Id: I96f90c3f407d01b2893d7bcacd64526cc9005cfc
diff --git a/scripts/build-unit-test-docker b/scripts/build-unit-test-docker
index b043cfa..6ace781 100755
--- a/scripts/build-unit-test-docker
+++ b/scripts/build-unit-test-docker
@@ -117,7 +117,7 @@
         ],
     ),
     "fmtlib/fmt": PackageDef(
-        rev="10.0.0",
+        rev="10.1.1",
         build_type="cmake",
         config_flags=[
             "-DFMT_DOC=OFF",