mkosi: move config options

Move some config option in the right section, fixes the following warning:
```
mkosi.conf: Setting Credentials should be configured in [Runtime], not [Host].
mkosi.conf: Setting RuntimeBuildSources should be configured in [Runtime], not [Host].
mkosi.conf: Setting RuntimeScratch should be configured in [Runtime], not [Host].
mkosi.conf: Setting QemuSmp should be configured in [Runtime], not [Host].
mkosi.conf: Setting QemuSwtpm should be configured in [Runtime], not [Host].
mkosi.conf: Setting QemuVsock should be configured in [Runtime], not [Host].
mkosi.conf: Setting QemuKvm should be configured in [Runtime], not [Host].
```

.github/workflows/coverage.yml

@@ -16,7 +16,7 @@ jobs:
 
     steps:
       - uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683
-      - uses: systemd/mkosi@07ef37c4c0dad5dfc6cec86c967a7600df1cd88c
+      - uses: systemd/mkosi@7d45366395f29fdb2b534a850c09d23d29b78fa9
 
       # Freeing up disk space with rm -rf can take multiple minutes. Since we don't need the extra free space
       # immediately, we remove the files in the background. However, we first move them to a different location
@@ -64,7 +64,7 @@ jobs:
                   MESON_OPTIONS=--werror
                   COVERAGE=1
 
-          [Host]
+          [Runtime]
           QemuMem=4G
           EOF
 

.github/workflows/mkosi.yml

@@ -113,7 +113,7 @@ jobs:
 
     steps:
       - uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683
-      - uses: systemd/mkosi@c4bbf3b71a3e2cf947995caedf10f69da3c4957a
+      - uses: systemd/mkosi@7d45366395f29fdb2b534a850c09d23d29b78fa9
 
       # Freeing up disk space with rm -rf can take multiple minutes. Since we don't need the extra free space
       # immediately, we remove the files in the background. However, we first move them to a different location
@@ -171,7 +171,7 @@ jobs:
           [Content]
           SELinuxRelabel=${{ matrix.relabel }}
 
-          [Host]
+          [Runtime]
           QemuMem=4G
           EOF