Bump okhttp to 5.1.0 (#440)

Bump okhttp to 5.1.0 and re-order dependency declarations so that the
Kotlin kernel for Jupyter will use the higher version of `okio`,
`3.15.0`, which is requested and required by `okhttp:5.1.0`, avoiding a
runtime failure.

The change in the buildscript is reflected in the library's published
`.pom` file. It appears that the kernel will pick the first seen version
of an artifact when traversing the dependencies and does not consider
dependency constraints. `okhttp` must be declared first in the pom file
and `moshi`, which depends on an older version of `okio`, must be
declared later.

This bump without re-ordering dependencies would result in a failure as
described in [Kotlin/kotlin-jupyter#484][issue] and seen in this [build
scan][failing-build] from #425.

[issue]: Kotlin/kotlin-jupyter#484
[failing-build]:
https://scans.gradle.com/s/3mvhfatr7gduy/tests/task/:library:examplesTest/details/com.gabrielfeo.develocity.api.example.notebook.NotebooksTest/testMostFrequentBuildsNotebook()?focused-execution=1&page=eyJvdXRwdXQiOnsiMCI6NH19&top-execution=1#L795

Author: gabrielfeo

gradle/libs.versions.toml

@@ -7,7 +7,7 @@ jupyter-testkit = "0.12.0-398"
 jupyter-plugin = "0.12.0-398"
 okio = "3.15.0"
 moshi = "1.15.2"
-okhttp = "4.12.0"
+okhttp = "5.1.0"
 retrofit = "3.0.0"
 kotlin-coroutines = "1.10.2"
 kotlin-binary-compatibility-validator = "0.18.1"

library/build.gradle.kts

@@ -16,17 +16,18 @@ tasks.processJupyterApiResources {
     )
 }
 
+// Order matters as this library is used as a Kotlin Jupyter kernel dependency (see #440)
 dependencies {
     constraints {
         implementation(libs.okio)
     }
-    api(libs.moshi)
-    implementation(libs.moshi.kotlin)
     api(libs.okhttp)
     implementation(libs.okhttp.logging.interceptor)
     api(libs.retrofit)
     implementation(libs.retrofit.converter.moshi)
     implementation(libs.retrofit.converter.scalars)
+    api(libs.moshi)
+    implementation(libs.moshi.kotlin)
     api(libs.kotlin.coroutines)
     implementation(libs.slf4j.api)
     runtimeOnly(libs.slf4j.simple)