Fix dependabot (#6986)

Follow-up to #6977 

Dependabot started failing after this because it was looking for all of
the relative includes that were inside of
`.github/project-root-duplicates/settings.gradle.kts`.

The solution that seems to work (I've tested on my fork) is to split
those includes out into a separate file, and `apply` that file.

Also fixes a busted markdown link (probably should have sent that in a
separate PR).

Resolves #6989

Author: trask

.github/project-root-duplicates/README.md .github/dependabot-symlinks/README.md.github/project-root-duplicates/README.md renamed to .github/dependabot-symlinks/README.md

@@ -1,5 +1,5 @@
 This directory and the two symlinks in it are used by the
-[dependabot configuration](../.github/dependabot.yml), because we can't include the root directory
+[dependabot configuration](../dependabot.yml), because we can't include the root directory
 in the dependabot scanning since then it will pick up all of the old library versions that we
 intentionally compile and test against.
 

…project-root-duplicates/build.gradle.kts …hub/dependabot-symlinks/build.gradle.kts.github/project-root-duplicates/build.gradle.kts renamed to .github/dependabot-symlinks/build.gradle.kts .github/project-root-duplicates/build.gradle.kts renamed to .github/dependabot-symlinks/build.gradle.kts

@@ -42,7 +42,7 @@ updates:
   - package-ecosystem: "gradle"
     # need to scope gradle dependency updates down in this repo because most of the instrumentations
     # intentionally test against old library versions
-    directory: ".github/project-root-duplicates"
+    directory: "/.github/dependabot-symlinks"
     rebase-strategy: "disabled"
     schedule:
       interval: "daily"

…ject-root-duplicates/settings.gradle.kts …/dependabot-symlinks/settings.gradle.kts.github/project-root-duplicates/settings.gradle.kts renamed to .github/dependabot-symlinks/settings.gradle.kts .github/project-root-duplicates/settings.gradle.kts renamed to .github/dependabot-symlinks/settings.gradle.kts

@@ -0,0 +1,3 @@
+// this file is only split out from settings.gradle.kts due to a dependabot limitation
+// for details see .github/project-root-duplicates/README.md
+includeBuild("conventions")

.github/dependabot.yml

@@ -84,7 +84,9 @@ buildCache {
 
 rootProject.name = "opentelemetry-java-instrumentation"
 
-includeBuild("conventions")
+// this is only split out due to a dependabot limitation
+// for details see .github/project-root-duplicates/README.md
+apply(from = "include-conventions.gradle.kts")
 
 include(":custom-checks")