minor fixes in eBPF post

_posts/2024-07-13-ebpf.md

@@ -20,7 +20,7 @@ To understand eBPF, we must first understand what is the kernel space and the us
 
 <figure>
     <a href="/assets/img/ebpf/kernel-space.png"><img src="/assets/img/ebpf/kernel-space.png"></a>
-    <figcaption style="text-align: center">The user space and the kernel space. Source: <a href="https://eunomia.dev/tutorials/0-introduce/" target="_blank">Eunomia</a>.</figcaption>
+    <figcaption style="text-align: center">The user space and the kernel space. Source: <a href="https://eunomia.dev/tutorials/0-introduce/" target="_blank">Eunomia</a></figcaption>
 </figure>
 
 When a program runs on the user space, it can interact with the kernel space through an API - the **system calls**. If a program wants to write to a file, it does not need to access the underlying memory directly; in a similar case, if a program wants to send packets over the network, it does not access the network controller directly; instead, it relies on the system calls, that expose an abstraction of the resources.
@@ -31,7 +31,7 @@ For those reasons, it may make sense to run a program in the kernel space. You h
 
 <figure>
     <a href="/assets/img/ebpf/kernelvsebpf.webp"><img src="/assets/img/ebpf/kernelvsebpf.webp"></a>
-    <figcaption style="text-align: center"><a href="https://isovalent.com/blog/post/ebpf-documentary-creation-story/" target="_blank">eBPF Comic by Philipp Meier and Thomas Graf.</a></figcaption>
+    <figcaption style="text-align: center"><a href="https://isovalent.com/blog/post/ebpf-documentary-creation-story/" target="_blank">eBPF Comic by Philipp Meier and Thomas Graf</a></figcaption>
 </figure>
 
 ---------------------
@@ -43,7 +43,7 @@ eBPF (**extended BPF**) is mainly an extension of the instruction set of the ori
 
 <figure>
     <a href="/assets/img/ebpf/loader-ebpf.png"><img src="/assets/img/ebpf/loader-ebpf.png"></a>
-    <figcaption style="text-align: center">Depiction of the interaction between eBPF and the Linux kernel. Source: <a href="https://oswalt.dev/2021/01/introduction-to-ebpf/" target="_blank">Introduction to eBPF</a>.</figcaption>
+    <figcaption style="text-align: center">Depiction of the interaction between eBPF and the Linux kernel. Source: <a href="https://oswalt.dev/2021/01/introduction-to-ebpf/" target="_blank">Introduction to eBPF</a></figcaption>
 </figure>
 
 In this way, you can code your program from the user space to be run in the kernel space, at runtime, and sandboxed.