Pin KSPBT workflow versions

Author: drewcassidy

.github/workflows/build.yml

@@ -13,4 +13,4 @@ on:
 
 jobs:
   build:
-    uses: KSPModdingLibs/KSPBuildTools/.github/workflows/build.yml@main
+    uses: KSPModdingLibs/KSPBuildTools/.github/workflows/build.yml@0.0.4

.github/workflows/create-release.yml

@@ -9,6 +9,6 @@ on:
 
 jobs:
   create-release:
-    uses: KSPModdingLibs/KSPBuildTools/.github/workflows/create-release.yml@main
+    uses: KSPModdingLibs/KSPBuildTools/.github/workflows/create-release.yml@0.0.4
     with:
       version-string: ${{ inputs.version-string }}