Fix qsr rhel 8.4 includes

Id has since changed to 8.6. Coin now detects faulty includes and
bails out if some includes are not found.

Change-Id: I2a07931c80b0878d5ace26c7ad8c444d11678a0e
Reviewed-by: Teemu Holappa <teemu.holappa@qt.io>

coin/platform_configs/qtsaferenderer-runtime.yaml

@@ -13,7 +13,7 @@ Include: [
     "windows-10_22h2-msvc2019",
     "windows-10_22h2-msvc2022",
     "windows-10_22h2-msvc2019-developer-build",
-    "rhel-8.4",
+    "rhel-8.6",
     "windows-10_22h2-mingw11",
     "windows-10_22h2-mingw11-developer-build",
     "windows-10_22h2-llvm",

coin/platform_configs/qtsaferenderer.yaml

@@ -12,7 +12,7 @@ Include: [
     "sles-15_sp4-static",
     "windows-10_22h2-msvc2019",
     "windows-10_22h2-msvc2022",
-    "rhel-8.4",
+    "rhel-8.6",
     "windows-10_22h2-mingw11",
     "windows-10_22h2-llvm",
     "windows-11_22h2-msvc2019"