Update golang to 1.18.5, 1.17.13

Update Go runtime to 1.18.5 to address CVE-2022-32189.

Full diff:
https://github.com/golang/go/compare/go1.18.4...go1.18.5

--------------------------------------------------------

From the security announcement:
https://groups.google.com/g/golang-announce/c/YqYYG87xB10

We have just released Go versions 1.18.5 and 1.17.13, minor point
releases.

These minor releases include 1 security fixes following the security
policy:

encoding/gob & math/big: decoding big.Float and big.Rat can panic

Decoding big.Float and big.Rat types can panic if the encoded message is
too short.

This is CVE-2022-32189 and Go issue https://go.dev/issue/53871.

View the release notes for more information:
https://go.dev/doc/devel/release#go1.18.5

Signed-off-by: Daniel Canter <dcanter@microsoft.com>

.github/workflows/nightly.yml

@@ -18,7 +18,7 @@ jobs:
     steps:
       - uses: actions/setup-go@v2
         with:
-          go-version: '1.18.4'
+          go-version: '1.18.5'
 
       - uses: actions/checkout@v2
         with:
@@ -155,7 +155,7 @@ jobs:
     steps:
       - uses: actions/setup-go@v2
         with:
-          go-version: '1.18.4'
+          go-version: '1.18.5'
 
       - uses: actions/checkout@v2
         with: